#include <bits/stdc++.h>

namespace DECLARATIONS {
  using namespace std;

  using ll = long long;
  using PI = pair<int, int>;
  template<class T> using V = vector<T>;
  using VI = V<int>;
#define _1 first
#define _2 second

#ifdef MY_DEBUG
# define DEBUG(x) x
#else
# define DEBUG(x)
#endif

  template<class T>
  inline void debug(T &A) {
    DEBUG(
        for (const auto &a : A) {
          cerr << a << " ";
        }
        cerr << '\n';
    )
  }

  template<class T>
  inline void debug_dim2(T &A) {
    DEBUG(
        for (const auto &as : A) {
          debug(as);
        }
    )
  }

  template<typename ... Args>
  inline void debug(const char *format, Args const &... args) {
    DEBUG(
        fprintf(stderr, format, args ...);
        cerr << '\n';
    )
  }

  template<typename ... Args>
  string format(const std::string &fmt, Args ... args) {
    size_t len = std::snprintf(nullptr, 0, fmt.c_str(), args ...);
    std::vector<char> buf(len + 1);
    std::snprintf(&buf[0], len + 1, fmt.c_str(), args ...);
    return std::string(&buf[0], &buf[0] + len);
  }
}
using namespace DECLARATIONS;

const int MOD = 1000000007;

int main() {
  std::ios::sync_with_stdio(false);
  cin.tie(nullptr);

  string S;
  cin >> S;
  VI A(9);
  for (char c : S) {
    A[c-'1']++;
  }

  debug(A);

  auto test = [&]() {
    V<V<V<VI>>> dp(10, V<V<VI>>(5, V<VI>(5, VI(2, -1))));
    dp[0][0][0][0] = 0;

    for (int i = 0; i < 9; ++i) {
      for (int j = 0; j < 5; ++j) {
        for (int k = 0; k < 5; ++k) {
          for (int l = 0; l < 2; ++l) {
            auto add = [&](int m, int add3, int add2) {
              int s = min(m, min(j, k));
              int v3 = dp[i][j][k][l] + s + add3;
              dp[i + 1][m - s][j - s][l+add2] = max(dp[i + 1][m - s][j - s][l+add2], v3);
            };

            if (dp[i][j][k][l] != -1) {
              if (A[i] >= 2 && l == 0) add(A[i] - 2, 0, 1);
              if (A[i] >= 3) add(A[i] - 3, 1, 0);
              add(A[i], 0, 0);
            }
          }
        }
      }
    }

    int c3 = dp[9][0][0][1];

    debug(dp[9][0][0]);

    return c3 == 4;
  };

  auto test7s = [&]() {
    return count_if(A.begin(), A.end(), [](int a){return a == 2;}) == 7;
  };

  for (int i = 0; i < 9; ++i) {
    if (A[i] < 4) {
      A[i]++;
      if (test() || test7s()) cout << i + 1 << '\n';
      A[i]--;
    }
  }

  return 0;
}