#!/usr/bin/python2
# -*- coding: utf-8 -*-
# †
r = [False] * 9

def check(v, j):
    if all(x == 0 for x in v):
        r[j] = True
    # 順子の探索
    for i in xrange(7):
        if v[i] > 0 and v[i+1] > 0 and v[i+2] > 0:
            v[i] -= 1; v[i+1] -= 1; v[i+2] -= 1
            check(v, j)
            v[i] += 1; v[i+1] += 1; v[i+2] += 1
    # 刻子の探索
    for i in xrange(9):
        if v[i] >= 3:
            v[i] -= 3
            check(v, j)
            v[i] += 3


s = raw_input()
v = [0] * 9
for c in s:
    v[int(c)-1] += 1


# i をツモる
for i in xrange(9):
    if v[i] == 4:
        continue
    v[i] += 1
    # k をアタマにする
    for k in xrange(9):
        if v[k] >= 2:
            v[k] -= 2
            check(v, i)
            v[k] += 2
    # 七対子の処理
    if sum(x == 2 for x in v) == 7:
        r[i] = True
    v[i] -= 1


for i, yes in enumerate(r, 1):
    if yes:
        print i