file1_col1	file1_col2	file1_col3
A	A	line1
B	A	line2
C	A	line3
D	A	line4
E	A	line5
F	A	line6
G	A	line7
H	A	line8
I	A	line9
J	A	line10
K	A	line11
L	A	line12
M	A	line13
N	A	line14
O	A	line15
P	A	line16
Q	A	line17
R	A	line18
S	A	line19
T	A	line20
U	A	line21
W	A	line23
Y	A	line25
Z	A	line22
Z	A	line24
Z	A	line26
