#include <iostream>
#include <cmath>
#include <cstdio>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
  int cx,cy,tx,ty;
  int t;
  //int grid[t+1][t+1];
  cin >> t;
  cin >> cx >> cy >> tx >> ty;
  int count = 0;
  std::vector<int> v;
  if(abs(cx-tx)%2 != 0){
    cout << "Impossible" << endl;
    return 0;
  } 
  else if(abs(cy-ty) == 0 && abs(cx-tx)%4 != 0){
    cout << "Impossible" << endl;
    return 0;
  }
  else if(abs(cx-tx)%2 == 0 && (abs(cy-ty)-(abs(cx-tx)/2))%2 != 0){
    cout << "Impossible" << endl;
    return 0;
  }
  else{
    while(1){
      if(cx == tx && cy == ty) break;
      if(cx > tx && cy >= ty){
        if(cx-2 > 0 || cy-1 > 0 || cx-2 < t || cy-1 < t){
          cx-=2;
          cy--;
          v.push_back(1);
          ++count;
        }       
      }
      else if(cx > tx && cy < ty){        
        if(cx-2 > 0 || cy+1 > 0 || cx-2 < t || cy+1 < t){
          cx-=2;
          cy++;
          v.push_back(2);
          ++count;
        }     
      }
      else if(cx < tx && cy >= ty){
        if(cx+2 >= 0 || cy-1 >= 0 || cx+2 < t || cy-1 < t){
          cx+=2;
          cy--;
          v.push_back(5);
          ++count;
        }
      }
      else if(cx < tx && cy < ty){       
        if(cx+2 >= 0 || cy+1 >= 0 || cx+2 < t || cy+1 < t){
          cx+=2;
          cy++;
          v.push_back(4);
          ++count;
        } 
      }
      else if(cx == tx && cy < ty){        
        if(cx >= 0 || cy+2 >= 0 || cx < t || cy < t){
          cy+=2;
          v.push_back(3);
          ++count;
        }
      }
      else if(cx == tx && cy > ty){   
        if(cx >= 0 || cy-2 >= 0 || cx < t || cy < t){
          cy-=2;
          v.push_back(6);
          ++count;
        }
      }
      else{
        cout << "Impossible" << endl;
        return 0;
      } 
    }
  }
  int n = v.size();
  sort(v.begin(),v.end());
  cout << count << endl;
  for(int i = 0; i < n; ++i){
    if(v[i] == 1) cout << "UL ";
    if(v[i] == 2) cout << "UR ";
    if(v[i] == 3) cout << "R ";
    if(v[i] == 4) cout << "LR ";
    if(v[i] == 5) cout << "LL ";
    if(v[i] == 6) cout << "L ";
  }
  cout << endl;
}