Hi

I need to do an algorithm that read a textfile have 14 Characters (Numbers 1 to 7)

Example:

44444444444444
44444444444442
14444444444444
42444444444444
..ETC

I must read each line and find lines with difference 1 or 2 characeters, in example above the first line and second line have difference
one character I must to do a XOR in each position

doing in first and second line

Each line can use only 1 time
The lines used can not to use again , then first and second line can not to used

44444444444446

But each row will can in maxime two symbols differents of the (1, 2 and 4)

44444444444446 have only one symbol ( 6) , then I must to read others line to find more row with one difference

Doing XOR between 44444444444446 and 14444444444444

See that the number 6 in bit format is
110 ==> 6
and the number 4 in bit format is
100 ==> 4

Then 6 contain 4 then will can to do XOR in each column

544444444444446 , Now This line have two symbols differente of the (1,2 and 4 ) , 5 and 6 then It do not need in others rows,

but the rows used
44444444444444
44444444444442
14444444444444

Can not to used again , Someboy can to help me to do a algortihm to read each row and to do operations with bits
what best language ?

I know a little VB and learning Python