#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>
int main() {
    int n; 
    scanf("%i", &n);
    int i_start; 
    int j_start; 
    int i_end; 
    int j_end; 
    scanf("%i %i %i %i", &i_start, &j_start, &i_end, &j_end);
    int i = 0,j = 0,k = 0,l = 0 ,count = 0,m,n1;
    char str[n][3];
    while(i_start < n && i_start >= 0)
    {
        while(j_start < n && j_start >= 0)
        {
            if(i_start < i_end && j_start < j_end){
                count++;
                strcpy(str[k],"DR ");
                i_start = i_start+2;
                j_start = j_start+1;
                k++;
            }
            else if(i_start < i_end && j_start > j_end)
            {
                count++;
                strcpy(str[k],"DL ");
                i_start = i_start+2;
                j_start = j_start-1;
                k++;
            }
            else if(j_start < j_end && i_start > i_end)
            {
                count++;
                strcpy(str[k],"UR ");
                i_start = i_start-2;
                j_start = j_start+1;
                k++;
            }
            else if(j_start > j_end && i_start > i_end)
            {
                count++;
                strcpy(str[k],"UL ");
                i_start =i_start-2;
                j_start = j_start-1;
                k++;
            }
            else if(i_start ==i_end && j_start > j_end)
            {
                count++;
                strcpy(str[k],"L ");
                //start =i_start-2;
                j_start = j_start-2;
                k++;
            }
            else if(i_start ==i_end && j_start < j_end)
            {
                count++;
                strcpy(str[k],"R ");
                //start =i_start-2;
                j_start = j_start+2;
                k++;
            }
            else if(j_start == j_end && j_start<1 &&i_start>i_end)
            {
                 count++;
                strcpy(str[k],"DR");
                i_start =i_start-2;
                j_start = j_start+1;
                k++;
            }
            else if(j_start == j_end && j_start<n-1&&i_start>i_end)
            {
                 count++;
                strcpy(str[k],"DL");
                i_start =i_start-2;
                j_start = j_start-1;
                k++;
            }
            else if(j_start == j_end && j_start<1 &&i_start<i_end)
            {
                 count++;
                strcpy(str[k],"UR");
                i_start =i_start-2;
                j_start = j_start+1;
                k++;
            }
            else if(j_start == j_end && j_start<n-1&&i_start<i_end)
            {
                 count++;
                strcpy(str[k],"UL");
                i_start =i_start-2;
                j_start = j_start-1;
                k++;
            }
            {
                
            }
             if(i_start==i_end&&j_start==j_end ||count > n)
    {
                 j=1;
                 break;
             }
            
        }
        if(j!=0)
            break;
    }
    if(i_start==i_end&&j_start==j_end)
    {
        printf("%d\n",count);
       
           for(m = 0; m < k ; m++)
           {
               for(n1= 0; n1< 2 ;n1++)
               {
               printf("%c",str[m][n1]);
                   
           }
               printf(" ");

    }
    }
    else
        printf("Impossible");
    return 0;
}