import re
string = "rocket123 firefly1000 attack577"
string_reverse = re.sub(r'\d+', lambda x: x.group(0)[::-1], string)
print(string_reverse)
aW1wb3J0IHJlCgpzdHJpbmcgPSAicm9ja2V0MTIzIGZpcmVmbHkxMDAwIGF0dGFjazU3NyIKCnN0cmluZ19yZXZlcnNlID0gcmUuc3ViKHInXGQrJywgbGFtYmRhIHg6IHguZ3JvdXAoMClbOjotMV0sIHN0cmluZykKcHJpbnQoc3RyaW5nX3JldmVyc2UpCg==