#include <bits/stdc++.h>
using namespace std;
int main(void){
    int sx,sy,tx,ty;
    cin>>sx>>sy>>tx>>ty;
    std::map<pair<int,int>, int> seen;
    int x=sx,y=sy;
    for (int i=0;i<2;i++) {
    seen[pair(tx,ty)]=0;
    seen[pair(x,y)]++;
    while (1) {
        if (x<tx&&seen[pair(x+1,y)]==0) {
            cout<<"R";
            seen[pair(x+1,y)]++;
            x++;
        } else if (y<=ty&&seen[pair(x,y+1)]==0) {
            cout<<"U";
            seen[pair(x,y+1)]++;
            y++;
        } else if (seen[pair(x-1,y)]==0) {
            cout<<"L";
            seen[pair(x-1,y)]++;
            x--;
        } else if (seen[pair(x,y-1)]==0) {
            cout<<"D";
            seen[pair(x,y-1)]++;
            y--;
        }
        if (x==tx&&y==ty) {
            break;
        }
    }
    seen[pair(sx,sy)]=0;
    //cout<<endl;
    while (1) {
        if (x>sx&&seen[pair(x-1,y)]==0) {
            cout<<"L";
            seen[pair(x-1,y)]++;
            x--;
        } else if (y>=sy&&seen[pair(x,y-1)]==0) {
            cout<<"D";
            seen[pair(x,y-1)]++;
            y--;
        } else if (seen[pair(x+1,y)]==0) {
            cout<<"R";
            seen[pair(x+1,y)]++;
            x++;
        } else if (seen[pair(x,y+1)]==0) {
            cout<<"U";
            seen[pair(x,y+1)]++;
            y++;
        }
        if (x==sx&&y==sy) {
            break;
        }
    }
    //cout<<endl;
    }
    cout<<endl;
}
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N=5500+5,M=1500,inf=0x3f3f3f3f,mod=1e9+7;
#define mst(a,b) memset(a,b,sizeof a)
#define lx x<<1
#define rx x<<1|1
#define reg register
#define PII pair<int,int>
#define fi first
#define se second
#define pb push_back
#define il inline
int sx,sy,ex,ey;
int main(){
	cin>>sx>>sy>>ex>>ey;
	for(int i=0;i<ey-sy;i++)	putchar('U');
	for(int i=0;i<ex-sx;i++) putchar('R');
	for(int i=0;i<ey-sy;i++)	putchar('D');
	for(int i=0;i<ex-sx;i++) putchar('L');
	putchar('L');
	for(int i=0;i<=ey-sy;i++)	putchar('U');
	for(int i=0;i<=ex-sx;i++) putchar('R');
	putchar('D');
	putchar('R');
	for(int i=0;i<=ey-sy;i++)	putchar('D');
	for(int i=0;i<=ex-sx;i++) putchar('L');
	putchar('U');
	return 0;
}