ID    file1   file2   file3   file4   file5 ...file25
ID1   ABC12   ABC12     -     ABC12     -      ABC12
ID2   XYZ11     -       -       -     XYZ11      -
ID3     -       -     EFG21   EFG21     -      EFG21
......
......
ID1072  -     PQR34   PQR34     -     PQR34      -