Hi! can anyone help me to make keygen? I have several valid keys. I just need to make keys out of these keys i have. Ty! Here are the samples...

UL416-LHY35-1FRIM-NIX5S-OSHG4
9VF91-NA0OU-1ZW8T-8GQTI-WZZHN
OI6FT-ZDGZ7-QWI2V-B9Q94-W9ZK0
BW6AK-XP6VF-5XVVQ-JH5I1-9UPSH