#include<bits/stdc++.h>
using namespace std;
const long long inf = 1e18;
const int mininf = 1e9 + 7;
#define int long long
#define pb emplace_back
inline int read(){int x=0,f=1;char ch=getchar();while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}while(ch>='0'&&ch<='9'){x=(x<<1)+(x<<3)+(ch^48);ch=getchar();}return x*f;}
inline void write(int x){if(x<0){x=~(x-1);putchar('-');}if(x>9)write(x/10);putchar(x%10+'0');}
#define put() putchar(' ')
#define endl puts("")
string s = "UDLR";
void solve(){
	mt19937 Rnd(time(0));
	for(int i = 1; i <= 50000; i++)	putchar(s[Rnd() % 4]);
	endl;
}

signed main(){
	int t = 1;
	while(t--)	solve();
	return 0;
}