#include "bits/stdc++.h"
using namespace std;
#define Rep(i,n) for(int i=0;i<(int)(n);i++)
#define For(i,n1,n2) for(int i=(int)(n1);i<(int)(n2);i++)
#define REP(i,n) for(ll i=0;i<(ll)(n);i++)
#define RREP(i,n) for(ll i=((ll)(n)-1);i>=0;i--)
#define FOR(i,n1,n2) for(ll i=(ll)(n1);i<(ll)(n2);i++)
#define put(a) cout<<a<<"\n"
#define all(a)  (a).begin(),(a).end()
#define SORT(a) sort((a).begin(),(a).end())
#define oorret 0
#define oor(x) [&](){try{x;} catch(const out_of_range& oor){return oorret;} return x;}()
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> P;
template<typename T1, typename T2> inline bool chmin(T1& a, T2 b) { if (a > b) { a = b; return 1; }return 0; }
template<typename T1, typename T2> inline bool chmax(T1& a, T2 b) { if (a < b) { a = b; return 1; }return 0; }

bool iswh0(vector<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(vector<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;
}

bool isch(vector<int> hand) {
	REP(i, hand.size()) {
		if (hand[i] != 2 && hand[i] != 0) {
			return false;
		}
	}
	return true;
}

int main() {
	string s;
	cin >> s;
   	int n = s.size();
	vector<int> hand(9, 0);
	REP(i, n) {
		hand[s[i] - '1']++;
	}
	vector<int> res;
	REP(i, 9) {
		if (hand[i] < 4) {
			hand[i]++;
			if (iswh2(hand)) {
				res.push_back(i + 1);
			}
			if (isch(hand)) {
				res.push_back(i + 1);
			}
			hand[i]--;
		}
		
	}
	REP(i, res.size()) {
		put(res[i]);
	}
	return 0;
}