#include<iostream>
#include<vector>
using namespace std;

const int di[] = {0,-1,0,1};
const int dj[] = {1,0,-1,0};
int main()
{
	int N;
	cin >> N;
	string cmd = "LURD";
	int cnt = 0;
	while(true)
	{
		if(cnt==2*N-3)cout << 'U' << endl;
		else if(cnt==2*N-2)cout << 'R' << endl;
		else if(cnt==2*N-1)cout << 'D' << endl;
		else if(cnt&1)cout << 'R' << endl;
		else cout << 'D' << endl;
		cnt++;
		char c; 
		cin >> c;
		if(c!=0) return 0;
	}
}