#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 c=0,a[1000],k=0;
    
    while(i_start!=i_end||j_start!=j_end)
    {
        if((abs(j_start-j_end)==1&&i_start==i_end)||(abs(i_start-i_end)==1&&j_start==j_end))
        {
            printf("Impossible");
            exit(0);
        }
        if(i_start==i_end)
        {
            if(j_end>j_start)
            {
                j_start=j_start+2;
                c++;
                a[k++]=3;
                
            }
            else
            {
                j_start=j_start-2;
                c++; 
                a[k++]=6;
                
            }
        }
        else 
        {
            if(i_end>i_start)
            {
                if(j_start>j_end)
                {
                    j_start=j_start-1;
                    i_start=i_start+2;
                    c++;
                    a[k++]=5;
                     
                }
                else
                {
                     j_start=j_start+1;
                    i_start=i_start+2;
                    c++;
                    a[k++]=4;
                     
                }
            }
            else
            {
                 if(j_start>j_end)
                {
                    j_start=j_start-1;
                    i_start=i_start-2;
                    c++;
                     a[k++]=1;
                     
                }
                else
                {
                     j_start=j_start+1;
                    i_start=i_start-2;
                    c++;
                    a[k++]=2;
                }
            }
                
        }
        }
    printf("%d\n",c);
for(int i=0;i<k;i++)
{
    for(int j=0;j<k-1-i;j++)
    {
        if(a[j]>a[j+1])
        {
            int temp=a[j];
            a[j]=a[j+1];
            a[j+1]=temp;
        }
    }
}
    for(int i=0;i<k;i++)
    {
        if(a[i]==1)
            printf("UL ");
        else if(a[i]==2)
            printf("UR ");
        else if(a[i]==3)
            printf("R ");
        else if(a[i]==4)
            printf("LR ");
        else if(a[i]==5)
            printf("LL ");
        else if(a[i]==6)
            printf("L ");
    }
    return 0;
}