Hi expert guys, I need your help with awk or python scripting! I need to find and mark rows in my file where there are element repeated in the following way: input.file: a_1 b_3 c_ 3 d_ 5 e_4 a_1 b_3 a_1 d_5 c_4 g_10 d_5 d_5 c_3 needed output.file: a_1 b_3 c_ 3 d_ 5 e_4 a_1 # b_3 a_1 d_5 c_4 g_10 d_5 # d_5 c_3 thank you very much in advance!

I do not recognize any pattern other than put a # sign in front of any line that equals 'b_3 a_1' or 'd_5 c_3'. Is that correct? Or am I missing something?

ok, sorry, I did not explained it clearly. In a_1 b_3 c_ 3 d_ 5 e_4 a_1 # b_3 a_1 d_5 c_4 g_10 d_5 # d_5 c_3 the 2 rows # b_3 a_1 and # d_5 c_3 have the same elements of row 1 and row 2, respectively, but in different order. let s say: for every given row a b I want to find if there is a different row with: b a Is is clear now? thanks a lot for your time!