import re
from collections import defaultdict
S = input()
warota = re.findall(r'[^ｗ]+ｗ+', S)
count = defaultdict(list)
if warota:
    for w in warota:
        c = w.count('ｗ')
        i = w.index('ｗ')
        count[c].append(w[0:i])
    m = max(count.keys())
    for ans in count[m]:
        print(ans)
else:
    print('')