def agari(r):
    def dfs(a,b):
        if a==1 and b==4:
            return True
        for i in range(1,10):
            if r[i]: break
        if a == 0 and r[i] >= 2: #頭
            r[i] -= 2
            if dfs(1,b): return True
            r[i] += 2
        if b <= 3 and r[i] >= 3: #刻
            r[i] -= 3
            if dfs(a,b+1): return True
            r[i] += 3
        if b <= 3 and r[i+1] and r[i+2]: #順
            r[i] -= 1
            r[i+1] -= 1
            r[i+2] -= 1
            if dfs(a,b+1): return True
            r[i] += 1
            r[i+1] += 1
            r[i+2] += 1
        return False

    #チートイ
    if r.count(2) == 7:
        return True
    return dfs(0,0)

r = [0]*12
for i in map(int,input()):
    r[i] += 1
for i in range(1,10):
    if r[i] == 4: continue
    r[i] += 1
    if agari(r[:]):
        print(i)
    r[i] -= 1