// Problem: No.2228 Creeping Ghost No.2228 蠕行鬼
// Contest: yukicoder
// URL: https://yukicoder.me/problems/no/2228
// Memory Limit: 512 MB
// Time Limit: 2000 ms

#include <bits/stdc++.h>

#define fastio ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define dbg(x) cout << #x << " = " << (x) << "\n";
#define popcount(x) __builtin_popcountll((x))
#define all(v) (v).begin(), (v).end()
#define pb emplace_back
#define x first
#define y second

using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;

const int inf = 0x3f3f3f3f;
const int mod = 1e9 + 7;

string op[2] = {"RRDD", "UULL"};

void solve() {
  int cnt;
  cin >> cnt;
  int cur = 0;
  for (int i = 0; i < cnt; i++) {
    cout << op[cur][i % 4];
    if (i && i % 4 == 0) {
      cur ^= 1;
    }
  }
}

int main() {
  fastio;
  int t = 1;
  // cin >> t;
  while (t--) {
    solve();
  }
  return 0;
}