#include <algorithm>
#include <iostream>
#include <numeric>
#include <cassert>
#include <vector>
#include <cmath>
#include <map>

typedef long long llong;
const int MAXN = 200000 + 10;
const int INF  = 1e9 + 1;

void solve()
{
    srand(357281);
    char let[2] = {'U', 'R'};
    while (true)
    {
        char c = let[rand()%2];
        std::cout << c << '\n' << std::flush;
        std::cin >> c;
        if (c == 'Y' || c == 'E')
        {
            exit(0);
        }
    }
}

void fastIO()
{
    std::ios_base :: sync_with_stdio(0);
    std::cout.tie(nullptr);
    std::cin.tie(nullptr);
}

int main()
{
    fastIO();
    solve();

    return 0;
}