aa b 4
ab a 0
ac d 1
ae f 2
at t 95 
az L 49
bz u 75
cr A 33
cs e 89
do i 15
eh n 37
ff l 14
If c 7
in c 48
is S 3 
jo . 11
lf ? 78
lo n 91
nm O 63
qq y 5
qt t 7 
qu B 41
tl E 8
to V 13
tt t 77
tx f 59
zz z 99