file2_col1	file2_col2	file2_col3
A	A	line1
B	B	line2
C	C	line3
D	D	line4
E	A	line5
F	B	line6
G	C	line7
H	D	line8
I	A	line9
J	B	line10
K	C	line11
L	D	line12
M	A	line13
N	B	line14
O	C	line15
P	D	line16
Q	A	line17
R	B	line18
S	C	line19
T	D	line20
U	A	line21
W	C	line23
Y	A	line25
Z	A	line26
Z	B	line22
Z	D	line24
