#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

void printShortestPath(int n, int i_start, int j_start, int i_end, int j_end) {
	int val,val2,i,j,a[1000];
   if((i_start%2==0&&(i_end%2==1))||((i_start%2==1)&&(i_end%2==0)))
        {
		printf("Impossible ");
    	exit (1);
	}
	else
    {
        val=i_start-i_end;
        val=val/2;
        if(val%2==0)//same row features
        {
			if((j_start%2==0&&(j_end%2==1))||((j_start%2==1)&&(j_end%2==0)))
       	 	{
			printf("Impossible");
        	exit (1);
       		}
		}
		else
		{
			if((j_start%2==0&&(j_end%2==0))||((j_start%2==1)&&(j_end%2==1)))
			{
			printf("Impossible 3");
			exit (1);
			}
		}
    }
    int count=0;
    for(i=i_start,j=j_start;i!=i_end||j!=j_end;count++)
	{
		if(i<i_end)
		{
			i=i+2;
			if(j>j_end)
			{
				a[count]=1;
				j=j-1;
			}
			else
			{
				a[count]=2;
				j=j+1;
			}
		}
		else if(i>i_end)
		{
			i=i-2;
			if(j>j_end)
			{
				a[count]=3;
				j=j-1;
			}
			else
			{
				a[count]=4;
				j=j+1;
			}
		}
		else
		{
			if(j>j_end)
			{
				j=j-2;
				a[count]=5;
			}
			else
			{
				j=j+2;
				a[count]=6;
			}
			
		}	
	}   
	printf("%d\n",count);
	for(i=0;i<count;i++)
	{
		if(a[i]==1)
		printf("LL ");
		if(a[i]==2)
		printf("LR ");
		if(a[i]==3)
		printf("UL ");
		if(a[i]==4)
		printf("UR ");
		if(a[i]==5)
		printf("L ");
		if(a[i]==6)
		printf("R ");
		
		}    
}

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);
    printShortestPath(n, i_start, j_start, i_end, j_end);
    return 0;
}