The OP says that the program ...neither prints out the output nor gives me no errors.... In fact, it doesn't print anything. I'm not sure that you've clarified it or made it more readable--nor did the OP request such--but your refactoring now makes it print only the sequences.

Please don't get me wrong: your bullet points for the OP were very well done. I suppose I just assumed too much thinking that the code you posted was a corrected version of the OP's code. Instead, the OP must now fix your code--or his/her own--to get it to work correctly. The latter, however, is certainly not a bad thing, and your bullet points should help...