import re
import sys
from typing import Optional

pattern = r"^(?:V|v)ersion\ bump(?:ed)?\ to\ ([0-9]+\.[0-9]+\.[0-9]+(?:-[a-zA-Z0-9]+)?).*"

def get_commit_message(string) -> Optional[str]:
    m = re.match(pattern, string)
    if m:
        return m.group(1)
    else:
        return None

if __name__ == "__main__":
    if len(sys.argv) >= 2:
        commit_message = sys.argv[1]
        result = get_commit_message(commit_message)
        print(result)
    else:
        print("Usage: python message.py <commit_message>")