X = [0] * 9
for a in input():
    X[int(a) - 1] += 1

def check_tempai(Y):
    RE = []
    for i in range(9):
        if Y[i] < 4 and check([a + 1 if i == j else a for j, a in enumerate(Y)]):
            RE.append(i + 1)
    return RE

def check(Y):
    for i in range(9):
        if Y[i] >= 2 and check_no_head([a - 2 if i == j else a for j, a in enumerate(Y)]):
            return 1
    if Y.count(2) == 7: return 1
    return 0
    
def check_no_head(Y):
    for i in range(9):
        if Y[i] >= 3:
            Y[i] -= 3
        if Y[i]:
            if i < 7 and Y[i+1] >= Y[i] and Y[i+2] >= Y[i]:
                Y[i+1] -= Y[i]
                Y[i+2] -= Y[i]
                Y[i] = 0
            else:
                return 0
    return 1

print("\n".join(map(str, check_tempai(X))))