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

int steps=0,a[100007];

void printShortestPath(int n, int j_s, int i_s, int j_e, int i_e)
{
	int i,j,ver=abs(j_e - j_s),hor=abs(i_e - i_s);
	/*if(i_s==i_e && j_s==j_e)
	{
		return
	}*/
	if(j_s==j_e)
	{
		if(hor%2!=0)
		{
			steps=-1;
            printf("Impossible\n");
			return;
		}
		else
		{
			if(i_s>i_e)
			{
				for(i=steps;i<steps+hor/2;i++)
				{
					a[i]=6;
				}
				steps+=hor/2;
			}
			else
			{
				for(i=steps;i<steps+hor/2;i++)
				{
					a[i]=3;
				}
				steps+=hor/2;
			}
		}
	}
	else if(i_s==i_e)
	{
		if(ver%4!=0)
		{
			steps=-1;
            printf("Impossible\n");
			return;
		}
		else
		{
			if(j_s>j_e)
			{
				for(i=steps;i<steps+ver/2;i++)
				{
					if(i%2==0)
					a[i]=1;
					else
					a[i]=2;
				}
				steps+=ver/2;
			}
			else
			{
				for(i=steps;i<steps+ver/2;i++)
				{
					if(i%2==0)
					a[i]=4;
					else
					a[i]=5;
				}
				steps+=ver/2;
			}
		}
	}
	else
	{
		if(ver%2!=0)
		{
			steps=-1;
            printf("Impossible\n");
			return;
		}
	}
    printf("%d\n",steps);
    for(i=0;i<steps;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 ");
    }
    printf("\n");
}

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;
}