ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789     1 0  0    0
 1.00000000 2.00000000          1          2          3          4   1 1451    1
 3.00000000 4.00000000          5          6          7          8   1 1451    2
 5.00000000 6.00000000          9         10         11         12   1 1451    3
 7.00000000 8.00000000         13         14         15         16   1 1451    4