#include<cstdio>
#include<iostream>
#define RI register int
#define CI const int&
using namespace std;
const int N=1005;
int n; char c[N][N];
int main()
{
    RI i,j; scanf("%d",&n);
    for (i=1;i<=n;++i) for (j=1;j<=n;++j) c[i][j]='.';
    if (n==1) return puts("U"),0;
    for (RI a=1,b=n;a<=b;++a,--b)
    {
        if (a==b) { c[a][b-1]='R'; c[a][b+1]='L'; continue; }
        if ((b-a+1)%2)
        {
            for (i=a;i<=b;++i)
            {
                c[i][a]=(i-a)&1?'.':'L';
                c[i][b]=(i-a)&1?'.':'R';
            }
            for (j=a+1;j<=b-1;++j)
            {
                c[a][j]=(j-a)&1?'U':'.';
                c[b][j]=(j-a)&1?'D':'.';
            }
        } else
        {
            for (i=a;i<=b-1;++i) c[i][a]=(i-a)&1?'.':'L';
            for (i=a+1;i<=b;++i) c[i][b]=(i-a)&1?'R':'.';
            for (j=a+1;j<=b;++j) c[a][j]=(j-a)&1?'U':'.';
            for (j=a;j<=b-1;++j) c[b][j]=(j-a)&1?'.':'D';
        }
    }
    for (i=1;i<=n;++i,putchar('\n')) for (j=1;j<=n;++j) putchar(c[i][j]);
    return 0;
}