For example, if you have input files: file1: 1a1 1b1 1c1 1d1 1e1 1f1 2a1 2b1 2c1 2d1 2e1 2f1 3a1 3b1 3c1 3d1 3e1 3f1 file2: 1a2 1b2 1c2 1d2 1e2 1f2 2a2 2b2 2c2 2d2 2e2 2f2 3a2 3b2 3c2 3d2 3e2 3f2 How do you want the output files to look like?