#include <bits/stdc++.h>
using namespace std;
#define rep(i, x, limit) for (long long i = (long long)x; i < (long long)limit; i++)
#define REP(i, x, limit) for (long long i = (long long)x; i <= (long long)limit; i++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define el endl
#define spa " "
#define Yes cout << "Yes" << el
#define No cout << "No" << el
#define YES cout << "YES" << el
#define NO cout << "NO" << el
#define inp(x) for(auto &i:x)cin>>i
#define eps (1e-10)
#define Equals(a,b) (fabs((a) - (b)) < eps )
#define debug(x) cerr << #x << " = " << x << el
using ll = long long;
using ull = unsigned long long;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using vi = vector<int>;
using vl = vector<ll>;
using vvl = vector<vector<ll>>;
using vs = vector<string>;
using vb = vector<bool>;
const double pi = 3.141592653589793238;
const int inf = 1073741823;
const ll infl = 1LL << 60;
const string ABC = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string abc = "abcdefghijklmnopqrstuvwxyz";
const ll MOD = 998244353;
#include<atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using vm = vector<mint>;

int main() {
    string N;
    cin >> N;

    string bin = "";
    for (char c : N) {
        int x = c - 'A' + 10;  // A～F -> 10～15
        for (int b = 3; b >= 0; b--) {
            bin += char('0' + ((x >> b) & 1));
        }
    }

    while ((int)bin.size() % 3 != 0) bin = "0" + bin;

    vector<int> cnt(8, 0);
    for (int i = 0; i < (int)bin.size(); i += 3) {
        int x = (bin[i] - '0') * 4 + (bin[i + 1] - '0') * 2 + (bin[i + 2] - '0');
        cnt[x]++;
    }

    int mx = *max_element(all(cnt));

    bool first = true;
    rep(i, 0, 8) {
        if (cnt[i] == mx) {
            if (!first) cout << spa;
            cout << i;
            first = false;
        }
    }
    cout << el;

    return 0;
}