#include <iostream>
#include <string>

int query(const std::string& s) {
    std::cout << s << std::endl;

    int x;
    std::string t;
    std::cin >> x >> t;

    if (x == 10) std::exit(0);
    return x;
}

void solve() {
    std::string s(10, '0');

    for (int i = 0; i < 10; ++i) {
        int x = -1, max = -1;

        for (int c = 0; c <= 9; ++c) {
            s[i] = '0' + c;
            int res = query(s);

            if (res > max) {
                max = res;
                x = c;
            }
        }

        s[i] = '0' + x;
    }
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}