#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
using ll = long long;
using ld = long double;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    string s; cin >> s;
    vector<int> cnt(10, 0);
    for(char c : s) cnt[c - '0']++;

    auto f = [](vector<int> cnt) {
        // 1
        for(int A = 1; A <= 9; A++) {
            if(cnt[A] >= 2) {
                vector<int> a = cnt;
                a[A] -= 2;
                int k = 0;
                for(int B : {1, 9, 2, 8, 3, 7, 4, 6, 5}) {
                    if(a[B] >= 3) a[B] -= 3, k++;
                    if(a[B] > 0) {
                        if(a[B + 1] >= a[B] && a[B + 2] >= a[B]) {
                            a[B + 1] -= a[B];
                            a[B + 2] -= a[B];
                            k += a[B];
                            a[B] = 0;
                        } else if(a[B - 2] >= a[B] && a[B - 1] >= a[B]) {
                            a[B - 2] -= a[B];
                            a[B - 1] -= a[B];
                            k += a[B];
                            a[B] = 0;
                        } else break;
                    }
                }
                if(k == 4) return true;
            }
        }
        // 2
        int k = 0;
        for(int i = 1; i <= 9; i++) if(cnt[i] == 2) k++;
        if(k == 7) return true;
        return false;
    };

    for(int x = 1; x <= 9; x++) {
        if(cnt[x] < 4) {
            cnt[x]++;
            if(f(cnt)) cout << x << "\n";
            cnt[x]--;
        }
    }
}