#include <iostream>
#include <string>

using namespace std;

string s;
int cnt[10];

bool solve()
{
	int sum = 0;
	for(int i = 1; i <= 9; i++) sum += cnt[i];
	if(sum == 0) return true;
	
	bool ret = false;
	for(int i = 1; i <= 9; i++){
		if(cnt[i] == 0) continue;
		if(cnt[i] >= 3){
			cnt[i] -= 3;
			ret |= solve();
			cnt[i] += 3;
		}
		if(i <= 7 && cnt[i] && cnt[i+1] && cnt[i+2]){
			cnt[i]--, cnt[i+1]--, cnt[i+2]--;
			ret |= solve();
			cnt[i]++, cnt[i+1]++, cnt[i+2]++;
		}
	}
	return ret;
}

int main(void)
{
	cin >> s;
	for(int i = 0; i < s.size(); i++) cnt[s[i]-'0']++;
	
	for(int i = 1; i <= 9; i++){
		if(cnt[i] == 4) continue;
		cnt[i]++;
		
		bool flag = true;
		for(int j = 1; j <= 9; j++){
			if(cnt[j] != 0 && cnt[j] != 2) flag = false;
		}
		if(flag){
			cout << i << endl;
			continue;
		}
		
		bool ans = false;
		for(int j = 1; j <= 9; j++){
			if(cnt[j] >= 2){
				cnt[j] -= 2;
				ans |= solve();
				cnt[j] += 2;
			}
		}
		cnt[i]--;
		
		if(ans) cout << i << endl;
	}
	
	return 0;
}