import java.io.*;
import java.util.*;
import java.text.*;
public class Solution {
    BufferedReader in;
    PrintWriter ob;
    StringTokenizer st;
    int flag = 0 , ans = Integer.MAX_VALUE;
    boolean vis[][];
    int ok[] = new int[1000];
    int res[] = new int[1000];
    int index = 0;
    void printShortestPath(int n, int i, int j, int endi, int endj , int cnt) {
       if(i<0 || i>=n || j<0 || j>=n || vis[i][j])
           return ;
       if(i==endi && j==endj) {
           flag = 1;
           if(cnt < ans) {
               ans = cnt;
               for(int p=0 ; p<index ; p++)
                   ok[p] = res[p];
           }
           return;
       }
        if(cnt > ans) return;
       vis[i][j] = true;
       int dx [] = {-2 , -2 , +0 , +2 , +2 , +0};
       int dy [] = {-1 , +1 , +2 , +1 , -1 , -2};
       for(int k = 0 ; k<dx.length ; k++) {
           res[index++] = k;
           printShortestPath( n , i+dx[k], j+dy[k] , endi , endj , cnt+1  );
           --index;
       }
       vis[i][j] = false;
    }

    public static void main(String[] args) throws IOException {
        new Solution().run();
    }
    void run() throws IOException {
        in = new BufferedReader ( new InputStreamReader(System.in) );
        ob = new PrintWriter ( System.out );
        solve();
        ob.flush();
    }
    void solve() throws IOException {
        int n = ni();
        vis = new boolean[n][n];
        int i_start = ni();
        int j_start = ni();
        int i_end = ni();
        int j_end = ni();
        printShortestPath(n, i_start, j_start, i_end, j_end , 0 );
        if(flag==0)
            ob.println("Impossible");
        else
        {
            ob.println(ans);
            printSol();
        }
    }
    void printSol() {
        for(int i=0 ; i<ans ; i++) {
            int ch = ok[i];
            if(ch==0) 
                ob.print("UL ");
            else if(ch==1)
                ob.print("UR ");
            else if(ch==2)
                ob.print("R ");
            else if(ch==3)
                ob.print("LR ");
            else if(ch==4)
                ob.print("LL ");
            else
                ob.print("L ");
        }
    }
    int ni() throws IOException {
        return Integer.parseInt(nextToken());
    }
    String nextToken() throws IOException {
        if(st == null || !st.hasMoreTokens())
             st = new StringTokenizer( in.readLine() );
        return st.nextToken();
    }
}