#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int size,x1,y1,x2,y2,flaf = 0,i =0;
    int arr[23];
    
    cin>>size>>x1>>y1>>x2>>y2;
    while(((x1!=x2)||(y1!=y2)))
    {
        if(x1<0||y1<0||x1>size||y1>size)
        { flaf = 1;
         break;}
        if(x2-x1<0)
        {x1=x1-2;
            if ((y2 - y1) ==0&&(x1-x2)>3)
                {
                    flaf = 1;
                    break;
                }
            
            
               
                else if((y2-y1)>0)
                {
                    y1=y1+1;
                     arr[i++]=2;
                     
                }
                
                else if((y2-y1)<=0)
                {
                    y1=y1-1;
                    arr[i++]=1;
                }
                 
                    
            }
        
        
        
       else if(x2-x1>0)
        {
            x1=x1+2;
            {
                if((y2-y1 == 0 )&& x2-x1<2) 
                {
                    flaf = 1;
                    break;
                }
                else if((y2-y1)<0)
                {
                    y1=y1-1;
                    arr[i++]=5;
                }
                 
                else if((y2-y1)>=0)
                {
                    y1=y1+1;
                     arr[i++]=4;
                     
                }
                
                    
            }
        }
        else {
            if((y2-y1==1)||(y1-y2==1)){
                flaf = 1;
                break;
            }
            else if((y2-y1)<0)
                {
                    y1=y1-2;
                    arr[i++]=6;
                }
                 
                else if ((y2-y1)>=0)
                {
                    y1=y1+2;
                     arr[i++]=3;
                     
                }
        }
    }
    if(flaf == 1)
    {cout<<"Impossible";}
    else
    {cout<<i<<endl;
        for(int j = 0;j<i;j++)
        {
            if(arr[j]==1)
                cout<<"UL"<<" ";
            
            if(arr[j]==2)
                cout<<"UR"<<" ";
            
            if(arr[j]==3)
                cout<<"R"<<" ";
            if(arr[j]==4)
                cout<<"LR"<<" ";
            if(arr[j]==5)
                cout<<"LL"<<" ";
            if(arr[j]==6)
                cout<<"L"<<" ";
        }
    } 
    
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    return 0;
}