<s>
The	O
Gmail	B-Protocol
interface	I-Protocol
makes	O
Gmail	B-Application
unique	O
amongst	O
webmail	B-Protocol
systems	O
for	O
several	O
reasons	O
.	O
</s>
<s>
Most	O
evident	O
to	O
users	O
are	O
its	O
search-oriented	O
features	O
and	O
means	O
of	O
managing	O
e-mail	O
in	O
a	O
"	O
conversation	O
view	O
"	O
that	O
is	O
similar	O
to	O
an	O
Internet	B-Application
forum	I-Application
.	O
</s>
<s>
An	O
official	O
redesign	O
of	O
the	O
Gmail	B-Protocol
interface	I-Protocol
was	O
rolled	O
out	O
on	O
November	O
1	O
,	O
2011	O
that	O
simplified	O
the	O
look	O
and	O
feel	O
of	O
Gmail	B-Application
into	O
a	O
more	O
minimalist	B-Device
design	O
to	O
provide	O
a	O
more	O
consistent	O
look	O
throughout	O
Google	B-Application
products	I-Application
and	O
services	O
as	O
part	O
of	O
an	O
overall	O
design	O
change	O
.	O
</s>
<s>
Gmail	B-Application
makes	O
use	O
of	O
Ajax	B-General_Concept
,	O
employing	O
browser	O
features	O
such	O
as	O
JavaScript	B-Language
,	O
keyboard	O
access	O
keys	O
and	O
Web	B-General_Concept
feed	I-General_Concept
integration	O
.	O
</s>
<s>
Gmail	B-Application
allows	O
users	O
to	O
conduct	O
advanced	O
searches	O
using	O
either	O
the	O
Advanced	O
Search	O
interface	O
or	O
through	O
search	O
operators	O
in	O
the	O
search	O
box	O
.	O
</s>
<s>
By	O
default	O
,	O
Gmail	B-Application
combines	O
search	O
terms	O
with	O
an	O
invisible	O
“	O
AND	O
”	O
.	O
</s>
<s>
Gmail	B-Application
allows	O
the	O
use	O
of	O
Boolean	O
operators	O
such	O
as	O
“	O
OR	O
”	O
for	O
finding	O
messages	O
that	O
match	O
at	O
least	O
one	O
of	O
the	O
more	O
search	O
terms	O
.	O
</s>
<s>
Gmail	B-Application
allows	O
users	O
to	O
create	O
rules	O
(	O
‘	O
filters’	O
)	O
for	O
the	O
automatic	O
organization	O
of	O
incoming	O
mail	O
.	O
</s>
<s>
Gmail	B-Application
can	O
perform	O
any	O
combination	O
of	O
the	O
following	O
actions	O
upon	O
an	O
email	O
that	O
meets	O
all	O
the	O
specified	O
criteria	O
in	O
a	O
filter	O
:	O
</s>
<s>
Labels	O
are	O
much	O
like	O
tags	B-General_Concept
on	O
a	O
blog	O
post	O
.	O
</s>
<s>
Gmail	B-Application
has	O
often	O
received	O
praise	O
for	O
replacing	O
the	O
limitations	O
of	O
hierarchical	O
folders	O
with	O
the	O
flexibility	O
of	O
labels	O
.	O
</s>
<s>
Gmail	B-Application
allows	O
users	O
to	O
'	O
archive	O
 '	O
emails	O
.	O
</s>
<s>
In	O
Gmail	B-Application
,	O
the	O
'	O
All	O
Mail	O
 '	O
section	O
displays	O
all	O
of	O
a	O
user	O
's	O
emails	O
,	O
excluding	O
the	O
ones	O
in	O
Spam	O
and	O
Bin	O
.	O
</s>
<s>
However	O
,	O
according	O
to	O
About.com,	O
this	O
limitation	O
can	O
be	O
overcome	O
by	O
accessing	O
Gmail	B-Application
through	O
IMAP	B-Protocol
.	O
</s>
<s>
Archiving	O
is	O
unique	O
to	O
Gmail	B-Application
and	O
is	O
not	O
offered	O
by	O
any	O
other	O
major	O
webmail	B-Protocol
service	O
or	O
email	O
client	O
.	O
</s>
<s>
Users	O
can	O
‘	O
train’	O
Gmail	B-Application
in	O
recognizing	O
important	O
messages	O
by	O
manually	O
marking	O
messages	O
as	O
important	O
.	O
</s>
<s>
Gmail	B-Application
takes	O
into	O
account	O
a	O
number	O
of	O
signals	O
to	O
determine	O
whether	O
a	O
message	O
is	O
important	O
or	O
not	O
.	O
</s>
<s>
Priority	B-Protocol
Inbox	I-Protocol
splits	O
up	O
the	O
inbox	O
into	O
sections	O
such	O
as	O
“	O
Important	O
and	O
unread	O
”	O
,	O
“	O
Unread	O
”	O
,	O
“	O
Starred	O
”	O
and	O
“	O
Everything	O
else	O
”	O
enabling	O
a	O
user	O
to	O
always	O
see	O
important	O
items	O
on	O
the	O
top	O
.	O
</s>
<s>
In	O
a	O
review	O
for	O
Lifehacker	O
,	O
Adam	O
Pash	O
writes	O
that	O
Gmail	B-Application
is	O
only	O
as	O
good	O
at	O
recognizing	O
important	O
emails	O
as	O
any	O
context-ignorant	O
computer	O
can	O
be	O
.	O
</s>
<s>
However	O
,	O
in	O
another	O
review	O
for	O
Lifehacker	O
,	O
Whitson	O
Gordon	O
calls	O
Priority	B-Protocol
Inbox	I-Protocol
"	O
one	O
of	O
Gmail	B-Application
’s	O
most	O
unsung	O
features	O
"	O
.	O
</s>
<s>
He	O
writes	O
that	O
Priority	B-Protocol
Inbox	I-Protocol
can	O
be	O
quite	O
helpful	O
as	O
long	O
as	O
users	O
give	O
it	O
a	O
chance	O
to	O
learn	O
from	O
their	O
habits	O
.	O
</s>
<s>
Beginning	O
June	O
2013	O
,	O
Gmail	B-Application
allowed	O
for	O
the	O
usage	O
of	O
tabs	O
in	O
the	O
inbox	O
for	O
automatically	O
categorizing	O
emails	O
by	O
five	O
general	O
categories	O
:	O
</s>
<s>
These	O
tabs	O
also	O
appear	O
in	O
Gmail	B-Application
's	O
Android	B-Application
and	O
iOS	B-Application
apps	O
.	O
</s>
<s>
Unlike	O
other	O
email	O
web	O
clients	O
,	O
Gmail	B-Application
does	O
not	O
permit	O
users	O
to	O
see	O
the	O
size	O
of	O
an	O
email	O
message	O
or	O
to	O
sort	O
email	O
(	O
for	O
example	O
,	O
alphabetically	O
by	O
subject	O
)	O
.	O
</s>
<s>
Gmail	B-Application
recognizes	O
messages	O
related	O
by	O
subject	O
and	O
groups	O
them	O
into	O
"	O
conversations	O
"	O
where	O
messages	O
in	O
a	O
back-and-forth	O
string	O
get	O
collected	O
together	O
and	O
appear	O
stacked	O
one	O
after	O
another	O
,	O
with	O
the	O
newest	O
messages	O
at	O
the	O
top	O
.	O
</s>
<s>
On	O
September	O
29	O
,	O
2010	O
,	O
Google	O
added	O
the	O
option	O
of	O
disabling	O
conversation	O
view	O
in	O
the	O
Gmail	B-Application
web	O
app	O
.	O
</s>
<s>
Gmail	B-Application
automatically	O
saves	O
contact	O
details	O
when	O
forwarding	O
e-mails	O
to	O
a	O
previously	O
unknown	O
recipient	O
.	O
</s>
<s>
If	O
the	O
user	O
changes	O
,	O
adds	O
,	O
or	O
removes	O
information	O
near	O
an	O
e-mail	O
such	O
as	O
the	O
name	O
while	O
sending	O
any	O
e-mail	O
,	O
it	O
also	O
updates	O
that	O
in	O
the	O
contact	O
list	O
,	O
unless	O
the	O
user	O
is	O
using	O
basic	B-Language
HTML	I-Language
view	O
,	O
designed	O
for	O
people	O
with	O
slower	O
internet	O
connections	O
or	O
browsers	O
that	O
do	O
not	O
support	O
AJAX	B-General_Concept
.	O
</s>
<s>
Users	O
can	O
import	O
contacts	O
(	O
in	O
several	O
different	O
ways	O
)	O
from	O
Microsoft	B-Application
Office	I-Application
Outlook	I-Application
,	O
Mozilla	B-Application
Thunderbird	I-Application
,	O
Eudora	B-Operating_System
,	O
Hotmail	B-Operating_System
,	O
Yahoo	O
!	O
</s>
<s>
Mail	O
,	O
orkut	B-Application
,	O
and	O
any	O
other	O
contact	O
list	O
in	O
a	O
CSV-format	O
file	O
.	O
</s>
<s>
Gmail	B-Application
also	O
allows	O
a	O
user	O
to	O
export	O
their	O
contacts	O
to	O
CSV	O
.	O
</s>
<s>
Gmail	B-Application
allows	O
the	O
importation	O
of	O
Google+	B-Application
social	O
media	O
contacts	O
,	O
although	O
as	O
of	O
2018	O
Google+	B-Application
is	O
being	O
discontinued	O
.	O
</s>
<s>
A	O
year	O
after	O
Gmail	B-Application
was	O
announced	O
,	O
Google	O
introduced	O
Rich	O
Text	O
Formatting	O
,	O
which	O
allows	O
the	O
font	O
size	O
,	O
color	O
and	O
text-alignment	O
to	O
be	O
customized	O
,	O
as	O
well	O
as	O
the	O
embedding	O
of	O
bullet	O
points	O
and	O
numbered	O
lists	O
.	O
</s>
<s>
Gmail	B-Application
also	O
features	O
Autosave	B-General_Concept
—	O
a	O
system	O
for	O
avoiding	O
loss	O
of	O
data	O
in	O
case	O
of	O
a	O
browser	O
crash	O
or	O
other	O
error	O
.	O
</s>
<s>
During	O
the	O
composition	O
of	O
an	O
e-mail	O
,	O
Gmail	B-Application
automatically	O
saves	O
a	O
draft	O
copy	O
of	O
the	O
message	O
and	O
of	O
any	O
attachments	O
.	O
</s>
<s>
Gmail	B-Application
places	O
the	O
cursor	O
above	O
quoted	O
text	O
when	O
replying	O
,	O
which	O
encourages	O
top-posting	O
.	O
</s>
<s>
Regardless	O
of	O
the	O
formatting	O
of	O
received	O
messages	O
,	O
Gmail	B-Application
's	O
conversation	O
view	O
defaults	O
to	O
showing	O
only	O
unique	O
content	O
,	O
in	O
chronological	O
order	O
.	O
</s>
<s>
Individual	O
Gmail	B-Application
messages	O
including	O
attachments	O
may	O
be	O
up	O
to	O
25	O
MB	O
in	O
size	O
.	O
</s>
<s>
However	O
,	O
users	O
can	O
send	O
files	O
of	O
up	O
to	O
15	O
GB	O
in	O
size	O
through	O
Google	B-Application
Drive	I-Application
.	O
</s>
<s>
Effectively	O
,	O
the	O
files	O
are	O
stored	O
on	O
Google	B-Application
Drive	I-Application
and	O
only	O
links	O
to	O
them	O
are	O
sent	O
.	O
</s>
<s>
This	O
means	O
that	O
the	O
recipients	O
can	O
access	O
the	O
file	O
only	O
if	O
it	O
is	O
shared	O
with	O
them	O
on	O
Google	B-Application
Drive	I-Application
.	O
</s>
<s>
Gmail	B-Application
notifies	O
the	O
user	O
if	O
the	O
file	O
being	O
sent	O
is	O
not	O
shared	O
with	O
the	O
recipient	O
and	O
allows	O
the	O
user	O
to	O
modify	O
the	O
sharing	O
settings	O
before	O
sending	O
the	O
file	O
.	O
</s>
<s>
Starting	O
in	O
December	O
2014	O
,	O
files	O
in	O
Google	B-Application
Drive	I-Application
can	O
also	O
be	O
sent	O
from	O
Gmail	B-Application
as	O
attachments	O
rather	O
than	O
links	O
,	O
thus	O
providing	O
recipients	O
access	O
to	O
the	O
files	O
even	O
if	O
they	O
are	O
later	O
deleted	O
from	O
the	O
sender	O
's	O
Drive	O
.	O
</s>
<s>
In	O
Gmail	B-Application
,	O
attachments	O
in	O
supported	O
formats	O
are	O
previewed	O
as	O
thumbnails	O
within	O
the	O
message	O
itself	O
and	O
clicking	O
on	O
the	O
thumbnail	O
opens	O
up	O
a	O
full-screen	O
view	O
of	O
the	O
image	O
or	O
document	O
through	O
which	O
users	O
can	O
browse	O
through	O
multiple	O
attachments	O
.	O
</s>
<s>
Attachments	O
can	O
be	O
downloaded	O
to	O
the	O
hard	O
disk	O
or	O
to	O
a	O
folder	O
on	O
Google	B-Application
Drive	I-Application
,	O
or	O
to	O
Google+	B-Application
Photos	O
in	O
case	O
of	O
image	O
files	O
.	O
</s>
<s>
The	O
Gmail	B-Protocol
interface	I-Protocol
supports	O
drag	O
and	O
drop	O
of	O
attachments	O
to	O
and	O
from	O
the	O
inbox	O
.	O
</s>
<s>
Gmail	B-Application
supports	O
plus-addressing	O
of	O
e-mails	O
.	O
</s>
<s>
Additionally	O
,	O
Gmail	B-Application
does	O
not	O
recognize	O
dots	O
(	O
periods	O
)	O
as	O
characters	O
within	O
a	O
username	O
.	O
</s>
<s>
Adding	O
or	O
removing	O
dots	O
from	O
a	O
Gmail	B-Application
address	O
does	O
not	O
change	O
the	O
actual	O
destination	O
address	O
.	O
</s>
<s>
However	O
,	O
this	O
does	O
not	O
work	O
in	O
Google	B-Application
Apps	I-Application
for	O
Your	O
Domain	O
.	O
</s>
<s>
Gmail	B-Application
allows	O
the	O
user	O
to	O
add	O
other	O
email	O
accounts	O
to	O
be	O
used	O
as	O
optional	O
sender	O
addresses	O
on	O
outgoing	O
email	O
.	O
</s>
<s>
However	O
,	O
the	O
SMTP	O
envelope	O
sender	O
address	O
will	O
contain	O
the	O
name	O
of	O
the	O
Gmail	B-Application
account	O
used	O
to	O
send	O
the	O
message	O
.	O
</s>
<s>
Thus	O
the	O
underlying	O
Gmail	B-Application
account	O
address	O
remains	O
readily	O
available	O
:	O
it	O
will	O
typically	O
appear	O
in	O
a	O
"	O
Sender	O
:	O
"	O
header	O
field	O
,	O
or	O
occasionally	O
in	O
the	O
subject	O
field	O
.	O
</s>
<s>
Some	O
mail	O
clients	O
will	O
write	O
"	O
From	O
:	O
Sender@gmail.com	O
 [ mailto:Sender@gmail.com ] 	O
On	O
Behalf	O
Of	O
...	O
"	O
upon	O
reply	O
,	O
making	O
the	O
situation	O
very	O
obvious	O
.	O
</s>
<s>
Gmail	B-Application
does	O
now	O
allow	O
users	O
to	O
specify	O
a	O
3rd	O
party	O
SMTP	O
server	O
.	O
</s>
<s>
Gmail	B-Application
can	O
use	O
this	O
to	O
send	O
outgoing	O
email	O
for	O
that	O
particular	O
account	O
avoiding	O
the	O
masked	O
account	O
problem	O
.	O
</s>
<s>
To	O
achieve	O
this	O
,	O
Google	O
hosts	O
the	O
content	O
of	O
the	O
message	O
on	O
their	O
own	O
servers	O
and	O
only	O
includes	O
a	O
link	O
to	O
the	O
hosted	O
content	O
within	O
the	O
main	O
body	O
of	O
the	O
email	O
,	O
which	O
(	O
non-Gmail	O
)	O
users	O
must	O
click	O
to	O
open	O
the	O
message	O
in	O
their	O
web	O
browser	O
.	O
</s>
<s>
In	O
addition	O
to	O
adding	O
extra	O
email	O
addresses	O
,	O
Gmail	B-Application
has	O
a	O
feature	O
called	O
"	O
Mail	O
Fetcher	O
"	O
that	O
allows	O
users	O
to	O
add	O
up	O
to	O
five	O
additional	O
accounts	O
to	O
retrieve	O
mail	O
from	O
via	O
POP3	B-Protocol
.	O
</s>
<s>
This	O
feature	O
does	O
not	O
support	O
retrieving	O
mail	O
from	O
IMAP	B-Protocol
servers	I-Protocol
.	O
</s>
<s>
Google	B-Application
Talk	I-Application
,	O
Google	O
's	O
service	O
for	O
instant	B-Application
messaging	I-Application
,	O
can	O
be	O
accessed	O
through	O
a	O
web-based	O
interface	O
on	O
Gmail	B-Application
's	O
site	O
.	O
</s>
<s>
The	O
web-based	O
interface	O
is	O
able	O
to	O
support	O
voice	O
and	O
video	O
calling	O
and	O
voice	O
messages	O
if	O
the	O
Google	B-Application
Talk	I-Application
client	O
is	O
running	O
in	O
the	O
background	O
.	O
</s>
<s>
All	O
messages	O
are	O
archived	O
to	O
the	O
Chats	O
mailbox	O
in	O
Gmail	B-Application
unless	O
'	O
Off	O
the	O
Record	O
 '	O
is	O
enabled	O
in	O
Google	B-Application
Talk	I-Application
.	O
</s>
<s>
Another	O
Google	B-Application
Talk	I-Application
integration	O
feature	O
is	O
voicemail	O
,	O
where	O
the	O
message	O
is	O
sent	O
to	O
the	O
recipient	O
's	O
Gmail	B-Application
inbox	O
;	O
as	O
well	O
as	O
synchronizing	O
contact	O
pictures	O
.	O
</s>
<s>
On	O
December	O
4	O
,	O
2007	O
,	O
Google	O
announced	O
integration	O
with	O
AOL	B-Protocol
Instant	I-Protocol
Messenger	I-Protocol
(	O
AIM	O
)	O
,	O
allowing	O
Gmail	B-Application
users	O
to	O
log	O
into	O
their	O
AIM	O
accounts	O
and	O
send	O
instant	B-Application
messages	I-Application
to	O
and	O
see	O
the	O
online	O
status	O
of	O
AIM	O
users	O
.	O
</s>
<s>
On	O
November	O
11	O
,	O
2008	O
,	O
Google	O
announced	O
video	O
chat	O
,	O
which	O
Gmail	B-Application
integrates	O
into	O
its	O
web-based	O
client	O
.	O
</s>
<s>
Google	B-Application
Calendar	I-Application
offered	O
Gmail	B-Application
integration	O
soon	O
after	O
its	O
announcement	O
on	O
April	O
13	O
,	O
2006	O
.	O
</s>
<s>
Recipients	O
who	O
use	O
Gmail	B-Application
will	O
then	O
receive	O
an	O
invitation	O
to	O
the	O
event	O
,	O
which	O
they	O
can	O
accept	O
or	O
decline	O
.	O
</s>
<s>
Furthermore	O
,	O
Gmail	B-Application
attempts	O
to	O
recognize	O
event	O
dates	O
and	O
locations	O
within	O
e-mails	O
,	O
and	O
gives	O
users	O
the	O
option	O
to	O
add	O
the	O
event	O
to	O
a	O
calendar	O
,	O
similar	O
to	O
Microsoft	O
's	O
Exchange	B-Operating_System
Server	I-Operating_System
.	O
</s>
<s>
Gmail	B-Application
offers	O
further	O
integration	O
with	O
some	O
other	O
Google	B-Application
products	I-Application
.	O
</s>
<s>
The	O
integration	O
with	O
Google	B-Application
Drive	I-Application
enables	O
users	O
to	O
share	O
large	O
files	O
of	O
up	O
to	O
15	O
GB	O
in	O
size	O
stored	O
on	O
Drive	O
through	O
Gmail	B-Application
,	O
and	O
to	O
save	O
email	O
attachments	O
directly	O
to	O
Google	B-Application
Drive	I-Application
.	O
</s>
<s>
Also	O
,	O
pictures	O
can	O
be	O
sent	O
directly	O
from	O
Picasa	B-Application
using	O
a	O
Gmail	B-Application
account	O
.	O
</s>
<s>
Gmail	B-Application
also	O
offered	O
integration	O
with	O
its	O
now-defunct	O
social	O
networking	O
and	O
messaging	O
tool	O
Google	B-Application
Buzz	I-Application
.	O
</s>
<s>
With	O
this	O
feature	O
,	O
Gmail	B-Application
users	O
could	O
share	O
links	O
,	O
photos	O
,	O
videos	O
,	O
status	O
messages	O
and	O
comments	O
organized	O
in	O
"	O
conversations	O
"	O
and	O
visible	O
in	O
the	O
user	O
's	O
inbox	O
.	O
</s>
<s>
Gmail	B-Application
uses	O
the	O
location	O
provided	O
by	O
the	O
user	O
to	O
correctly	O
time	O
theme	O
changes	O
with	O
the	O
local	O
sunrise	O
,	O
sunset	O
,	O
or	O
weather	O
.	O
</s>
<s>
In	O
June	O
2012	O
,	O
Gmail	B-Application
introduced	O
custom	O
themes	O
,	O
enabling	O
users	O
to	O
set	O
their	O
own	O
backgrounds	O
.	O
</s>
<s>
Users	O
can	O
either	O
choose	O
from	O
a	O
large	O
number	O
of	O
'	O
featured	O
 '	O
images	O
,	O
upload	O
an	O
image	O
from	O
the	O
computer	O
or	O
phone	O
,	O
choose	O
from	O
Google+	B-Application
albums	O
,	O
or	O
add	O
an	O
image	O
by	O
URL	O
.	O
</s>
<s>
On	O
April	O
2	O
,	O
2014	O
,	O
Gmail	B-Application
added	O
the	O
ability	O
to	O
share	O
custom	O
themes	O
via	O
email	O
or	O
Google+	B-Application
,	O
or	O
through	O
a	O
public	O
link	O
.	O
</s>
<s>
Labelling	O
(	O
tagging	B-General_Concept
)	O
is	O
limited	O
to	O
message	O
threads	O
.	O
</s>
<s>
Some	O
users	O
can	O
experience	O
difficulties	O
when	O
submitting	O
e-mail	O
addresses	O
from	O
the	O
Gmail	B-Application
address	O
book	O
to	O
the	O
addressee	O
line	O
on	O
the	O
compose	O
e-mail	O
window	O
.	O
</s>
<s>
However	O
,	O
it	O
is	O
possible	O
to	O
open	O
the	O
composed	O
message	O
in	O
a	O
new	O
window	O
so	O
the	O
address	O
book	O
can	O
be	O
opened	O
,	O
or	O
another	O
instance	O
of	O
Gmail	B-Application
can	O
be	O
opened	O
in	O
another	O
window	O
to	O
access	O
the	O
address	O
book	O
.	O
</s>
<s>
Gmail	B-Application
's	O
current	O
documented	O
help	O
on	O
this	O
issue	O
states	O
:	O
"	O
While	O
Gmail	B-Application
does	O
n't	O
currently	O
support	O
the	O
functionality	O
to	O
open	O
your	O
Contacts	O
list	O
while	O
composing	O
a	O
message	O
,	O
we	O
're	O
testing	O
many	O
new	O
features	O
to	O
improve	O
our	O
service.	O
"	O
</s>
<s>
Although	O
Gmail	B-Application
's	O
advertisements	O
have	O
received	O
praise	O
for	O
not	O
obtruding	O
,	O
they	O
can	O
take	O
up	O
more	O
space	O
than	O
Flash-based	O
banners	O
when	O
up	O
to	O
six	O
"	O
sponsored	O
links	O
"	O
appear	O
next	O
to	O
an	O
email	O
.	O
</s>
<s>
However	O
,	O
when	O
a	O
Gmail	B-Application
message	O
is	O
sent	O
to	O
another	O
email	O
address	O
of	O
a	O
different	O
provider	O
,	O
there	O
will	O
be	O
no	O
advertisements	O
in	O
the	O
message	O
unlike	O
most	O
other	O
webmail	B-Protocol
providers	O
.	O
</s>
<s>
When	O
a	O
Gmail	B-Application
mailbox	O
reaches	O
capacity	O
,	O
users	O
can	O
search	O
for	O
emails	O
by	O
size	O
in	O
order	O
to	O
delete	O
the	O
largest	O
ones	O
first	O
.	O
</s>
