#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> lpair;
const ll MOD = 1e9 + 7;
const ll INF = 1e18;
#define rep(i,m,n) for(ll i = (m); i < (n); i++)
#define rrep(i,m,n) for(ll i = (m); i >= (n); i--)
#define print(x) cout << (x) << endl;
#define print2(x,y) cout << (x) << " " << (y) << endl;
#define printa(x,n) for(ll i = 0; i < n; i++){ cout << (x[i]) << " ";} cout<<endl;
bool iswh0(const int* hand)
{
  int r, a = hand[0], b = hand[1];

  for(int i=0; i<7; i++){
    if(r=a%3, b>=r && hand[i+2]>=r){
      a=b-r; b=hand[i+2]-r;
    }
    else return false;
  }
  if(a%3==0 && b%3==0) return true;
  else return false;
}
bool iswh2(int* hand)
{
  int p = 0;
  for(int i=0; i<9; i++){
    p += i*hand[i];
  }

  for(int i=p*2%3; i<9; i+=3){//ここでiを、牌の和を3で割った余りを2で割った数に初期化
    hand[i] -= 2;

    if(hand[i]>=0){
      if(iswh0(hand)){
        hand[i] += 2;
        return true;
      }
    }
    hand[i] += 2;
  }
  return false;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    string S;
    cin >> S;
    sort(S.begin(), S.end());
    rep(t,1,10){
        bool ok = false;
        int hand[10] = {};
        rep(i,0,S.size()) hand[S[i] - '1']++;
        hand[t-1]++;
        // 七対子
        ll cnt_2 = 0;
        rep(i,0,9){
            if(hand[i] == 2) cnt_2++;
        }
        if(cnt_2 == 7) ok = true;

        if(iswh2(hand)) ok = true;

        if(ok){
            if(hand[t-1] != 5) print(t);
        }
    }
    
}