from collections import Counter
from sys import stdin


def main():
    input = lambda: stdin.readline()[:-1]
    A = input()

    o = format(int(A, 16), "o")
    x = Counter(o)
    n, prev = "", 0
    for k, v in x.most_common():
        if prev <= v:
            n += k
        else:
            break
        prev = v
    ans = sorted(n)
    print(*ans)


main()