aa_	count_n
0	0
1	28810
2	0
3	183344
4	0
5	0
6	0
7	0
8	0
9	0
A	15618
B	0
C	4122
D	16053
E	23114
F	12422
G	18147
H	4971
I	27372
J	0
K	27489
L	25457
M	7570
N	14945
O	0
P	10659
Q	4855
R	12293
S	12956
T	12229
U	0
V	19840
W	2578
X	33
Y	13091
Z	0