# -*- coding: utf-8 -*-
"""
No.342 一番ワロタｗｗ
https://yukicoder.me/problems/no/342

"""
import sys
from sys import stdin
from collections import defaultdict
input = stdin.readline

def solve(S):
    res = defaultdict(list)
    t = S.split('ｗ')

    i = 0
    w = 0
    chunk = ''
    while True:
        if t[i] != '':
            if chunk != '':
                res[w].append(chunk)
            chunk = t[i]
            w = 1
        else:
            w += 1
        i += 1
        if i >= len(t):
            if t[-1] == '' or t[-1] == chunk:
                w -= 1
            if chunk != '' and w > 0:
                res[w].append(chunk)
            break

    max_k = 0
    for k, v in res.items():
        max_k = max(max_k, k)

    if max_k > 0:
        return res[max_k]
    else:
        return []


def main(args):
    S = input().strip()
    ans = solve(S)
    print(*ans, sep='\n')


if __name__ == '__main__':
    main(sys.argv[1:])