#include <bits/stdc++.h>
using namespace std;
int main(void){
    string s;
    cin >> s;
    string bstr;
    for (int i = (int)s.size()-1; i >= 0; i--) {
        bitset<4> b(stoi(s.substr(i, 1), nullptr, 16));
        bstr = b.to_string() + bstr;
    }
    
    while (bstr.size()%3 != 0) {
        bstr = "0" + bstr;
    }
    string ostr;
    for (int i = (int)bstr.size()-3; i >= 0; i -= 3) {
        bitset<3> o(stoi(bstr.substr(i, 3), nullptr, 2));
        ostr = to_string(o.to_ulong()) + ostr;
    }
    
    //take.max
    vector<int> aoct(8);
    for (int i = 0; i < (int)ostr.size(); i++) {
        aoct[stoi(ostr.substr(i, 1))]++;
    }
    
    int mxs = -1;
    vector<int> ans;
    for (int i = 0; i < 8; i++) {
        if (aoct[i] > mxs) {
            ans.resize(0);
            mxs = aoct[i];
            ans.push_back(i);
        }
        else if (aoct[i] == mxs) {
            ans.push_back(i);
        }
    }
    for (int i = 0; i < (int)ans.size(); i++) {
        cout << ans[i] << ((i == (int)ans.size()-1) ? "\n" : " ");
    }
}