import sequtils,strutils
var
    cnt : array[1..9 , int]
    s = stdin.readline

proc bfs(atama : bool, mentu : int, A : array[1..9, int]) : bool =
    if atama and mentu == 4:
        return true
    var f : bool
    var titoi = 0
    for i,a in A:
        if a > 4:
            return false
        if a == 2:
            titoi += 1
    if titoi == 7:
        return true
    for i,a in A:
        if a > 0:
            if i <= 7 and a > 0 and A[i + 1] > 0 and A[i + 2] > 0:
                var A2 = A
                for j in 0..2:
                    A2[i + j] -= 1
                f = bfs(atama, mentu + 1, A2)
                if f:
                    return f
            if a > 2:
                var A2 = A
                A2[i] -= 3
                f = bfs(atama, mentu + 1, A2)
                if f:
                    return f
            if a > 1 and atama == false:
                var A2 = A
                A2[i] -= 2
                f = bfs(true, mentu, A2)
                if f:
                    return f
    return false


for c in s:
    cnt[ord(c) - ord('0')] += 1
    
for m in 1..9:
    var B = cnt
    B[m] += 1
    if bfs(false, 0, B):
        echo m