#dinucleotide	frequency
AA	2223	0.140411824154
AC	761	0.0480672056594
AG	612	0.0386558868115
AT	1951	0.123231430015
CA	725	0.0457933299646
CC	545	0.0344239514907
CG	134	0.00846387064174
CT	1208	0.0763011622031
GA	561	0.0354345629106
GC	306	0.0193279434058
GG	255	0.0161066195048
GT	420	0.0265285497726
TA	2038	0.128726629611
TC	1000	0.0631632137443
TG	541	0.0341712986357
TT	2552	0.161192521475