flag = False
a = [0] * 9
def dfs(n):
    global flag
    if flag: return
    if n == 5:
        flag = True
        return
    if n == 0:
        for i in range(9):
            if a[i] >= 2:
                a[i] -= 2
                dfs(n + 1)
                a[i] += 2
    
    for i in range(9):
        if a[i] >= 3:
            a[i] -= 3
            dfs(n + 1)
            a[i] += 3
    
    for i in range(7):
        if a[i] >= 1 and a[i + 1] >= 1 and a[i + 2] >= 1:
            a[i] -= 1
            a[i + 1] -= 1
            a[i + 2] -= 1
            dfs(n + 1)
            a[i] += 1
            a[i + 1] += 1
            a[i + 2] += 1 

def is_tiitoitu():
    toitu = 0
    for i in range(9):
        if a[i] == 2: toitu += 1
    return toitu == 7
s = list(map(int,input()))

for i in range(9):
    flag = False
    a = [0] * 9
    for j in s:
        a[j - 1] += 1
    if a[i] == 4: continue
    a[i] += 1
    dfs(0)
    if flag or is_tiitoitu(): print(i + 1)