# -*- coding: utf-8 -*-
from collections import defaultdict

s = input()
L = len(s)

# X文字の文字列のリストを管理
mp = defaultdict(list)

count = 0
t = ""
w = 'ｗ'
last = ''

for i in reversed(range(L)):
    c = s[i]
    if c==w:
        if last==w:
            count += 1
        else:
            # register
            mp[count].append(t)
            t = ""
            count = 1
    # 文字
    else:
        if last=='':
            continue
        else:
            t = c + t
    last = c
    
if(t!=""):
    mp[count].append(t)

if len(mp)==0:
    exit(0)

keys = sorted(list(mp.keys()))
ma = keys[-1]

texts = mp[ma]
for s in reversed(texts):
    print(s)