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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */
    
    int n;
    cin>>n;
    int x1,x2,y1,y2;
    
    cin>>x1>>y1>>x2>>y2;
    
    pair<int,string> arr[200][200];
    
    arr[x1][y1].first=0;
    queue<pair<int,int>> q;
    
    q.push({x1,y1});
    
    
    while(!q.empty()){
        
        pair<int,int> p=q.front();
        
        int x=p.first;
        int y=p.second;
        q.pop();
          if(x!=x1&&y!=y1){
              arr[x1][y1].second="s";
          }      
        if(x-2>=0&&y-1>=0&&arr[x-2][y-1].second.empty()){
            
            q.push({x-2,y-1});
            arr[x-2][y-1].first=arr[x][y].first+1;
            arr[x-2][y-1].second=arr[x][y].second+"UL ";
            
        }
        
        if(x-2>=0&&y+1<n&&arr[x-2][y+1].second.empty()){
            
            q.push({x-2,y+1});
            arr[x-2][y+1].first=arr[x][y].first+1;
            arr[x-2][y+1].second=arr[x][y].second+"UR ";
            
        }
        
        
        if(y+2<n&&arr[x][y+2].second.empty()){
            
            q.push({x,y+2});
            arr[x][y+2].first=arr[x][y].first+1;
            arr[x][y+2].second=arr[x][y].second+"R ";
            
        }
        
        if(x+2<n&&y+1<n&&arr[x+2][y+1].second.empty()){
            
            q.push({x+2,y+1});
            arr[x+2][y+1].first=arr[x][y].first+1;
            arr[x+2][y+1].second=arr[x][y].second+"LR ";
            
        }
        
        if(x+2<n&&y-1>=0&&arr[x+2][y-1].second.empty()){
            
            q.push({x+2,y-1});
            arr[x+2][y-1].first=arr[x][y].first+1;
            arr[x+2][y-1].second=arr[x][y].second+"LL ";
            
        }
        
        if(y-2>=0&&arr[x][y-2].second.empty()){
            
            q.push({x,y-2});
            arr[x][y-2].first=arr[x][y].first+1;
            arr[x][y-2].second=arr[x][y].second+"L ";
            
        }
        
        if(arr[x2][y2].second.empty()==0){
            cout<<arr[x2][y2].first<<endl;
            cout<<arr[x2][y2].second;
            break;
        }
        
    }
    
    if(q.empty()){
        cout<<"Impossible";
    }
    
    
    
    return 0;
    
    
}