import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    static void printShortestPath(ArrayList<String> res_l,int n, int i_start, int j_start, int i_end, int j_end) {
        
        //System.out.println("#"+j_start+","+i_start);
        
        ArrayList<int[]> compareList = new ArrayList<int[]>();
        compareList.add(0,new int[]{j_start-2,i_start-1});//UL
        compareList.add(1,new int[]{j_start+1,i_start-2});//UR
        compareList.add(2,new int[]{j_start+2,i_start}); //R
        compareList.add(3,new int[]{j_start-1,i_start+2});//LR
        compareList.add(4,new int[]{j_start+2,i_start-1}); //LL
        compareList.add(5,new int[]{j_start,i_start-2}); //L
        String ans = "";
        int si = 0;
        int sj = 0;
        int end = 0;
        for(int i = 0; i<=5; i++){
            int ii = compareList.get(i)[0];//Row
            int jj = compareList.get(i)[1];//Col
            //System.out.println(i+"__"+ii+","+jj);
            if(ii<n && jj<n && ii>=0 && jj>=0 && (ii!=i_end || jj!=j_end)){
                if(si==0 && sj==0){
                    ans = getAns(i);
                    si = ii;
                    sj = jj;
                   // System.out.println(i+" ---=====>:"+si+","+sj);
                }
            }
            if(jj==j_end && ii==i_end){
                //System.out.println(i+"!!!---=====>:"+ii+","+jj);
                ans = getAns(i);
                end = 1;
                break;
            }
        }
        res_l.add(ans);
      // System.out.println("---------------");
        if(end==0){
            if(ans==""){
                System.out.println("Impossible");
                return;
            }else {
                
                printShortestPath(res_l,n,sj, si, i_end, j_end);
            }
        }else{
            
            System.out.println(res_l.size());
            for(String s:res_l){
                System.out.print(s+' ');
            }
        }
    }

    static String getAns(int i){
        String ans = "";
        switch (i){
            case 0:
                ans = "UL";
                break;
            case 1:
                ans = "UR";
                break;
            case 2:
                ans = "R";
                break;
            case 3:
                ans = "LR";
                break;
            case 4:
                ans = "LL";
                break;
            case 5:
                ans = "L";
                break;
        }
        return ans;
    }


    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int i_start = in.nextInt();
        int j_start = in.nextInt();
        int i_end = in.nextInt();
        int j_end = in.nextInt();
        ArrayList<String> res_l = new ArrayList<String>();
        printShortestPath(res_l, n, i_start, j_start, i_end, j_end);
        in.close();
    }
}