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):
    k1 = 0
    k2 = 0
    for i in range(7):
        if p[i] - k1 - k2 < 0:
            return False
        k0 = (p[i] - k1 - k2) % 3
        if p[i+1] - k0 - k1 < 0 or p[i+2] - k0 < 0:
            return False
        k2 = k1
        k1 = k0
    if (p[7] - k1 - k2) % 3 != 0 or (p[8] - k1) % 3 != 0:
        return False
    return True


def check(p):
    for i in range(9):
        if p[i] >= 2:
            p[i] -= 2
            if can_decomp(p):
                p[i] += 2
                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(a):
        print(i + 1)

    a[i] -= 1