#include<bits/stdc++.h>
using namespace std;
using ll = long long;
void solve(void)
{
    int n,m;
    cin>>n>>m;
    string s;
    for(int i=1;i<=n;i++)
    {
        cin>>s;
    }
    s="";
    mt19937 rnd(random_device{}());
    string step="LRDU";
    for(int i=0;i<50000;i++)
    {
        s+=step[rnd()%4];
    }
    assert(s.length()<=50000);
    cout<<s<<endl;
}
int main(void)
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int t=1;
    while(t--)
    {
        solve();
    }
    return 0;
}