<s>
The	O
Molecular	B-Application
Modelling	I-Application
Toolkit	I-Application
(	O
MMTK	B-Application
)	O
is	O
an	O
open-source	B-Application
software	I-Application
package	O
written	O
in	O
Python	B-Language
,	O
which	O
performs	O
common	O
tasks	O
in	O
molecular	O
modelling	O
.	O
</s>
<s>
,	O
MMTK	B-Application
consists	O
of	O
about	O
18,000	O
lines	O
of	O
Python	B-Language
code	I-Language
,	O
12,000	O
lines	O
of	O
hand-written	O
C	O
code	O
,	O
and	O
some	O
machine-generated	O
C	O
code	O
.	O
</s>
