import copy

a = [0] * 9
s = list(map(int,input()))
for i in s:
    a[i - 1] += 1


def seven_pairs(a):
    cnt = 0
    for i in range(9):
        if a[i] == 2: cnt += 1
    return cnt == 7


def can_decomp(p):
    cnt = 0
    for i in range(9):
        if p[i] >= 3:
            cnt += 1
            p[i] -= 3
        if i < 7:
            if p[i] >= 2 and p[i+1] >= 2 and p[i+2] >= 2:
                cnt += 2
                p[i] -= 2
                p[i + 1] -= 2
                p[i + 2] -= 2
            elif p[i] >= 1 and p[i+1] >= 1 and p[i+2] >= 1:
                cnt += 1
                p[i] -= 1
                p[i + 1] -= 1
                p[i + 2] -= 1
    return cnt == 4


def check(p):
    for i in range(9):
        if p[i] >= 2:
            p[i] -= 2
            if can_decomp(copy.deepcopy(p)):
                return True
            p[i] += 2
    return False


for i in range(9):
    if a[i] == 4: continue
    a[i] += 1
    if seven_pairs(a):
        print(i + 1)
    elif check(copy.deepcopy(a)):
        print(i + 1)

    a[i] -= 1