S = list(map(int,input()))

def solve(x):
    nums = [0]*10
    for s in S+[x]:
        nums[s] += 1
    if max(nums) > 4:
        return False
    two = 0
    for i in nums:
        two += i == 2
    if two == 7:
        return True

    for b in range(1<<10):
        nnums = nums[:]
        for i in range(10):
            if b >> i & 1:
                nnums[i] -= 3

        if min(nnums) < 0:
            continue
        record = nnums[:]
        for i in range(10):
            nnums = record[:]
            if nnums[i] < 2:
                continue
            nnums[i] -= 2
            for i in range(8):
                while nnums[i]:
                    if nnums[i]*nnums[i+1]*nnums[i+2]:
                        nnums[i] -= 1
                        nnums[i+1] -= 1
                        nnums[i+2] -= 1
                    else:
                        break
            if sum(nnums) == 0 and max(nnums) == 0:

                return True
    return False
for i in range(1,10):
    if solve(i):
        print(i)