import re
from collections import defaultdict


def main():
    s = input().lstrip("ｗ")
    if "ｗ" not in s:
        print()
        return

    d = defaultdict(list)
    l = re.split(r"[^ｗ]+", s)
    for i in range(len(l)):
        d[len(l[i])].append(i)

    w = re.split(r"ｗ+", s)
    for i in d[max(d.keys())]:
        print(w[i - 1])


if __name__ == '__main__':
    main()