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

int curr_i,curr_j;


void printShortestPath(int n, int i_start, int j_start, int i_end, int j_end) {
int sum0=0,sum1=0,sum2=0,sum3=0,sum4=0,sum6=0;
    while(curr_i>i_end+1&&curr_j>j_end){
        if(curr_j!=0&&curr_i>1){curr_j--;curr_i--;curr_i--;}
    sum0++;}
    while(curr_i>i_end+1&&curr_j<j_end){
        if(curr_j<n-1&&curr_i>1){curr_j++;curr_i--;curr_i--;}
        sum1++;
    }
    while(curr_i==i_end&&curr_j<j_end-1){
        if(curr_j<n-2){curr_j++;curr_j++;}
        sum2++;
    }
    while(curr_i<i_end-1&&curr_j<j_end){
        if(curr_j<n-1&&curr_i<n-2){curr_j++;curr_i++;curr_i++;}
        sum3++;
    }
    while(curr_i<i_end-1&&curr_j>j_end){
        if(curr_j>0&&curr_i<n-2){curr_j--;curr_i++;curr_i++;}
        sum4++;
    }
    while(curr_i==i_end&&curr_j>j_end-1){
        if(curr_j>1){curr_j--;curr_j--;}
        sum6++;
    }
    if(curr_i==i_end&&curr_j==j_end){
        printf("%d\n",sum0+sum1+sum2+sum3+sum4+sum6);
        while(sum0--)
            printf("UL ");
        while(sum1--)
            printf("UR ");
        while(sum2--)
            printf("R ");
        while(sum3--)
            printf("LR ");
        while(sum4--)
            printf("LL ");
        while(sum6--)
            printf("L ");
    }
    else printf("Impossible");
}

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