kupc2016D.cpp

signed main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    int N;
    cin >> N;
    vector<string> s(2);
    bool toRight = true;
    while (true) {
        rep(state, 4) {
            if (toRight) {
                cout << s[0] + (state % 2 ? '.' : '#') << endl;
                cout << s[1] + (state / 2 ? '.' : '#') << endl;
            } else {
                cout << (state % 2 ? '.' : '#') + s[0] << endl;
                cout << (state / 2 ? '.' : '#') + s[1] << endl;
            }
            string ret;
            cin >> ret;
            if (ret[0] == 'e') {
                return 0;
            } else if (ret[0] == 'T') {
                // next_step
                if (toRight) {
                    s[0] = s[0] + (state % 2 ? '.' : '#');
                    s[1] = s[1] + (state / 2 ? '.' : '#');
                } else {
                    s[0] = (state % 2 ? '.' : '#') + s[0];
                    s[1] = (state / 2 ? '.' : '#') + s[1];
                }
                break;
            } else {
                // go_on_this_step

                if (state == 3) {
                    // change_direction
                    assert(toRight);
                    toRight = false;
                }
            }
        }
    }

}