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

struct iofast_t {
    iofast_t() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} iofast;

struct uns_t {} uns;
template <typename Element, typename Head, typename ...Args>
auto vec(Element init, Head arg, Args ...args) {
    if constexpr (sizeof...(Args) == 0) return std::vector(arg, init);
    else return std::vector(arg, vec(init, args...));
}
template <typename Element, typename Head, typename ...Args>
auto vec(uns_t, Head arg, Args ...args) {
    return vec(Element(), arg, args...);
}

template <typename T, typename Compare = less<T>>
T &chmin(T &l, T r, Compare &&f = less<T>()) { return l = min(l, r, f); }
template <typename T, typename Compare = less<T>>
T &chmax(T &l, T r, Compare &&f = less<T>()) { return l = max(l, r, f); }

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

    auto ctoi = [&](char c) -> int {
        if (isdigit(c)) {
            return c - '0';
        }
        return c - 'A' + 10;
    };

    string b;
    for (auto c : n) {
        b += bitset<4>(ctoi(c)).to_string();
    }

    string o;

    reverse(begin(b), end(b));
    for (int i = 0; i < size(b); i += 3) {
        auto s = b.substr(i, 3);
        reverse(begin(s), end(s));
        auto m = stoi(s, nullptr, 2);
        o += to_string(m);
    }

    int c[8] = {};
    for (int i = 0; i < 8; ++i) {
        c[i] = count(begin(o), end(o), '0' + i);
    }

    int max = *max_element(begin(c), end(c));

    set<char> ans;
    for (int i = 0; i < 8; ++i) {
        if (c[i] == max) {
            ans.insert(i + '0');
        }
    }

    cout << *begin(ans);
    for_each(next(begin(ans)), end(ans), [](auto x) {
        cout << ' ' << x;
    });
    cout << endl;
}