#!/usr/bin/env python3

"""Checks tag before release.
Feed it the first changelog line, and then all available tags.
"""

import re, sys
tag = "v" + re.findall("\\((.*)\\)", input())[0]
if tag not in map(str.strip, sys.stdin.readlines()):
    raise Exception("Changelog's current version doesn't have a tag. Push the tag!")