#!/usr/bin/env python3
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
import itertools

# %%
S = sorted(map(int, read().rstrip().decode()))

# %%
triples = []
for x in range(1, 10):
    triples.append((x, x, x))
    if x <= 7:
        triples.append((x, x + 1, x + 2))

# %%
patterns = set((x, x) for x in range(1, 10))
for _ in range(4):
    newpatterns = []
    for p, t in itertools.product(patterns, triples):
        newpatterns.append(tuple(sorted(p + t)))

    patterns = set(newpatterns)


# %%
for subset in itertools.combinations(range(1, 10), 7):
    p = tuple(sorted(subset + subset))
    patterns.add(p)


# %%
def is_complete(nums):
    if len(nums) != 14:
        return False
    p = tuple(sorted(nums))
    if any(x == y for x, y in zip(p, p[4:])):
        return False
    return p in patterns


# %%
for x in range(1, 10):
    if is_complete(S + [x]):
        print(x)