#!/usr/bin/env python3
#
# Copyright (C) 2025 Siemens
#
# SPDX-License-Identifier: MIT
#
# Takes a reverse-sorted, line separated list and
# returns the first element that is equal or smaller
# than the first argument.

import sys

for line in sys.stdin:
    if line.rstrip() <= sys.argv[1]:
        print(line.rstrip())
        break