aa_	count_n
0	0
1	0
2	17937
3	4095
4	9430
5	0
6	0
7	0
8	0
9	0
A	12714
B	0
C	2429
D	9929
E	10188
F	6591
G	12058
H	3733
I	9070
J	0
K	9612
L	13209
M	3578
N	7731
O	0
P	7626
Q	6117
R	7936
S	9436
T	9282
U	0
V	11018
W	2392
X	79
Y	6123
Z	0