#include<bits/stdc++.h>
using namespace std;

int main(){
	vector<int> org(9);
	for (int i=0; i<13; i++){
		char x; cin >> x;
		org[x-'1']++;
	}

	auto inner_hantei_1 = [&]() -> bool {
		vector<int> cop = org;
		for (int d=0; d<9; d++){
			if (cop[d] < 0) return false;
			cop[d] %= 3;
			if (cop[d] > 0 && d >= 8){
				return false;
			}
			cop[d+1] -= cop[d];
			cop[d+2] -= cop[d];
			cop[d] = 0;
		}
		return true;
	};

	auto hantei_1 = [&]() -> bool {
		bool mode = 0;
		for (int d=0; d<9; d++){
			if (org[d] >= 2){
				org[d] -= 2;
				if (inner_hantei_1()) mode = 1;
				org[d] += 2;
				if (mode) break;
			}
		}
		return mode;
	};

	auto hantei_2 = [&]() -> bool {
		int cnt = 0;
		for (int i=0; i<9; i++){
			if (org[i] == 2){
				cnt++;
			}
		}
		return cnt == 7;
	};

	auto hantei = [&]() -> bool {
		return hantei_1() || hantei_2();
	};

	for (int st=0; st<9; st++){
		if (org[st] == 4) continue;
		org[st]++;
		if (hantei()){
			cout << st+1 << '\n';
		}
		org[st]--;
	}
}