#include <bits/stdc++.h>

#define lsb(x) (x & (-x))

using ull = unsigned long long;
using ll = long long;

using namespace std;



int main() {
#ifdef HOME
    ifstream cin("input.in");
    ofstream cout("output.out");
#endif
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);

    int n;
    cin >> n;

    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            if (i == 1) {
                if (j == 1) {
                    cout << "L";
                } else if (j == 2) {
                    cout << "U";
                } else {
                    cout << "R";
                }
            } else if (i == 2) {
                if (j == 1) {
                    cout << "D";
                } else if (j == 2) {
                    cout << "R";
                } else {
                    if (j % 2 == 1) {
                        cout << ".";
                    } else {
                        cout << "D";
                    }
                }
            } else {
                if (j % 2 == 1) {
                    cout << "D";
                } else {
                    cout << ".";
                }
            }
        }
        cout << "\n";
    }

    return 0;
}