import re
s = "0207a97"
l = [i for i in re.findall('\d+',s) if '9' not in i]
if len(l)>0:
print(max(l, key=int))
aW1wb3J0IHJlCgpzID0gIjAyMDdhOTciCmwgPSBbaSBmb3IgaSBpbiByZS5maW5kYWxsKCdcZCsnLHMpIGlmICc5JyBub3QgaW4gaV0KaWYgbGVuKGwpPjA6CiAgICBwcmludChtYXgobCwga2V5PWludCkpCiAgICA=