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


int main() {
   int n,x1,x2,y1,y2;
    cin>>n;
    cin>>x1>>y1>>x2>>y2;
    if(abs(x2-x1)%2==1||(abs(x2-x1)%4==2&&abs(y2-y1)%2==0)||(abs(x2-x1)%4==0&&abs(y2-y1)%2==1))
        cout<<"Impossible"<<endl;
    else
    {
           if(x1>x2&&y1>y2)
           {
               int p=y1-y2;
               int q=x1-x2;
               if(2*p<q)
               {
                    cout<<q/2<<endl;
                   if(q/2<y1+y2)
                   {
                       for(int i=0;i<(q/2-p)/2+p;i++)
                       cout<<"UL ";
                       for(int i=0;i<(q/2-p)/2;i++)
                       cout<<"UR ";
                   }     
                 else
                 {   
                   for(int i=0;i<y1;i++)
                       cout<<"UL ";
                   for(int i=0;i<(q/2-y1-y2)/2;i++)
                       cout<<"UR UL ";
                   for(int i=0;i<y2;i++)
                       cout<<"UR ";
                 }   
               }
               else
               {
                   cout<<q/2+(p-q/2)/2<<endl;
                   for(int i=0;i<q/2;i++)
                       cout<<"UL ";
                   for(int i=0;i<(p-q/2)/2;i++)
                       cout<<"L ";
               }
           }
         else if(x1>x2&&y1<y2)
           {
              int p=y2-y1;
               int q=x1-x2;
               if(2*p<q)
               {
                   cout<<q/2<<endl;
                   if(q/2<y1+y2)
                   {
                        for(int i=0;i<(q/2-p)/2;i++)
                       cout<<"UL ";
                       for(int i=0;i<(q/2-p)/2+p;i++)
                       cout<<"UR ";
                   }
                   else
                  {     
                   for(int i=0;i<y1;i++)
                       cout<<"UL ";
                   for(int i=0;i<(q/2-y1-y2)/2;i++)
                       cout<<"UR UL ";
                   for(int i=0;i<y2;i++)
                       cout<<"UR ";
                  }     
               }
               else
               {
                   cout<<q/2+(p-q/2)/2<<endl;
                   for(int i=0;i<q/2;i++)
                       cout<<"UR ";
                   for(int i=0;i<(p-q/2)/2;i++)
                       cout<<"R ";
               }
           }
         else if(x1<x2&&y1>y2)
           {
             int p=y1-y2;
               int q=x2-x1;
               if(2*p<q)
               {
                   cout<<q/2<<endl;
                   if(q/2+y1+y2<2*(n-1))
                   {
                        for(int i=0;i<(q/2-p)/2;i++)
                       cout<<"LR ";
                       for(int i=0;i<(q/2-p)/2+p;i++)
                       cout<<"LL ";
                   }
                   else
                  {    
                   for(int i=0;i<n-1-y1;i++)
                       cout<<"LR ";
                   for(int i=0;(q/2+y1+y2)/2-(n-1);i++)
                       cout<<"LL LR";
                   for(int i=0;i<n-1-y2;i++)
                       cout<<"LL ";
                   }     
               }
               else
               {
                   cout<<q/2+(p-q/2)/2<<endl;
                   for(int i=0;i<q/2;i++)
                       cout<<"LL ";
                   for(int i=0;i<(p-q/2)/2;i++)
                       cout<<"L ";
               }
           }
         else
           {
              int p=y2-y1;
               int q=x2-x1;
               if(2*p<q)
               {
                   cout<<q/2<<endl;
                   if(q/2+y1+y2<2*(n-1))
                   {
                        for(int i=0;i<(q/2-p)/2+p;i++)
                       cout<<"LR ";
                       for(int i=0;i<(q/2-p)/2;i++)
                       cout<<"LL ";
                   }
                   else
                 {     
                    for(int i=0;i<n-1-y1;i++)
                       cout<<"LR ";
                   for(int i=0;(q/2+y1+y2)/2-(n-1);i++)
                       cout<<"LL LR";
                   for(int i=0;i<n-1-y2;i++)
                       cout<<"LL ";
                 }      
               }
               else
               {
                   cout<<q/2+(p-q/2)/2<<endl;
                   for(int i=0;i<(p-q/2)/2;i++)
                       cout<<"R ";
                   for(int i=0;i<q/2;i++)
                       cout<<"LR ";
               }
           }
    }
    return 0;
}