<s>
The	O
7	O
frieze	B-Algorithm
groups	I-Algorithm
,	O
the	O
two-dimensional	O
line	B-Algorithm
groups	I-Algorithm
,	O
with	O
a	O
direction	O
of	O
periodicity	O
are	O
given	O
with	O
five	O
notational	O
names	O
.	O
</s>
<s>
The	O
Schönflies	O
notation	O
is	O
given	O
as	O
infinite	O
limits	O
of	O
7	O
dihedral	B-Algorithm
groups	I-Algorithm
.	O
</s>
<s>
The	O
related	O
pure	O
reflectional	O
Coxeter	B-Algorithm
group	I-Algorithm
are	O
given	O
with	O
all	O
classes	O
except	O
oblique	O
.	O
</s>
