Hi, Hi,
I am taking a string as an input from the user and it should only contain the chars:L , M or R I tried the folllowing in kodos but they are still not perfect: [^A-K,^N-Q,^S-Z,^0-9] [L][M][R] [LRM]?L?[LRM]? etc but they do not exactly meet what I need. For eg: LRLRLRLRLM is ok but LRLRLRNL is not as it has 'N' .like that. regards, SZ The string may or may not have all the three chars. -- http://mail.python.org/mailman/listinfo/python-list