#include <bits/stdc++.h>
using namespace std;


int main()
{
    int x1,y1,x2,y2;
    cin >> x1>>y1>>x2>>y2;
    
    bool right = x2-x1>=0;
    bool up = y2-y1>=0;
    
    bool w0 = x2-x1 == 0;
    bool h0 = y2-y1 == 0;
    
    //1ループ
    if(w0)
    {
        for(int i = 0; i < abs(y1 - y2)+1; i++)
        {
            if(up)
            {
                cout << "U";
            }
            else
            {
                cout << "D";
            }
        }
        cout << "L";
        cout << "L";
        
        for(int i = 0; i < abs(y1 - y2) + 2; i++)
        {
            if(!up)
            {
                cout << "U";
            }
            else
            {
                cout << "D";
            }
        }
        cout << "R";
        cout << "R";
        if(up)
        {
            cout << "U";
        }
        else
        {
            cout << "D";
        }
        //2roop
        cout << "R";
        for(int i = 0; i < abs(y1 - y2); i++)
        {
            if(up)
            {
                cout << "U";
            }
            else
            {
                cout << "D";
            }
        }
        cout << "L";
        cout << "L";
        for(int i = 0; i < abs(y1 - y2); i++)
        {
            if(!up)
            {
                cout << "U";
            }
            else
            {
                cout << "D";
            }
        }
        cout << "R";
        
    }
    else if(h0)
    {
        for(int i = 0; i < abs(x1 - x2) + 1; i++)
        {
            if(right)
            {
                cout << "R";
            }
            else
            {
                cout << "L";
            }
        }
        cout << "U";
        cout << "U";
        for(int i = 0; i < abs(x1 - x2)+2; i++)
        {
            if(!right)
            {
                cout << "R";
            }
            else
            {
                cout << "L";
            }
        }
        cout << "D";
        cout << "D";
        if(right)
        {
            cout << "R";
        }
        else
        {
            cout << "L";
        }
        
        //2roop
        cout << "D";
        for(int i = 0; i < abs(x1 - x2); i++)
        {
            if(right)
            {
                cout << "R";
            }
            else
            {
                cout << "L";
            }
        }
        cout << "U";
        cout << "U";
        
        for(int i = 0; i < abs(x1 - x2); i++)
        {
            if(!right)
            {
                cout << "R";
            }
            else
            {
                cout << "L";
            }
        }
        cout << "D";
        
    }
    else
    {
        for(int i = 0; i < abs(x1 - x2); i++)
        {
            if(right)
            {
                cout << "R";
            }
            else
            {
                cout << "L";
            }
        }
        for(int i = 0; i < abs(y1 - y2); i++)
        {
            if(up)
            {
                cout << "U";
            }
            else
            {
                cout << "D";
            }
        }
        
        
        
        for(int i = 0; i < abs(x1 - x2); i++)
        {
            if(!right)
            {
                cout << "R";
            }
            else
            {
                cout << "L";
            }
        }
        for(int i = 0; i < abs(y1 - y2) + 1; i++)
        {
            if(!up)
            {
                cout << "U";
            }
            else
            {
                cout << "D";
            }
        }
        
        //2roop
        for(int i = 0; i < abs(x1 - x2) + 1; i++)
        {
            if(right)
            {
                cout << "R";
            }
            else
            {
                cout << "L";
            }
        }
        for(int i = 0; i < abs(y1 - y2) + 1; i++)
        {
            if(up)
            {
                cout << "U";
            }
            else
            {
                cout << "D";
            }
        }
        if(!right)
        {
            cout << "R";
        }
        else
        {
            cout << "L";
        }
        if(up)
        {
            cout << "U";
        }
        else
        {
            cout << "D";
        }
        for(int i = 0; i < abs(x1 - x2) + 1; i++)
        {
            if(!right)
            {
                cout << "R";
            }
            else
            {
                cout << "L";
            }
        }
        for(int i = 0; i < abs(y1 - y2) + 1; i++)
        {
            if(!up)
            {
                cout << "U";
            }
            else
            {
                cout << "D";
            }
        }
        if(right)
        {
            cout << "R";
        }
        else
        {
            cout << "L";
        }
    }
    cout << endl;
    
    
    
    
    
    
    return 0;
    
}

Measured memory_bytes: 256