#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 is;
    int js;
    int ie;
    int je;
    int arr[100000];
    int i=0;
    scanf("%i %i %i %i", &is, &js, &ie, &je);
    int flag = 0, count = 0;
    while(1)
    {
        if(is == ie && js < je && (abs(js - je) == 2)  )
        {
            js = js + 2;
            count = count + 1;
            arr[i] = 3;
            i = i + 1;
        }
        if(is < ie && js <= je )
        {
            is = is + 2;
            js = js + 1;
            arr[i]=4;
            i = i + 1;
            count  = count + 1;
        }
        if(is < ie && js > je)
        {
            is = is + 2;
            js = js - 1;
            arr[i] = 5;
            i = i+1;
            count  = count + 1;
        }
        if(is > ie && js <= je)
        {
            is = is - 2;
            js = js + 1;
            arr[i] = 2;
            i = i + 1;
            count  = count + 1;
        }
        if(is > ie && js > je)
        {
            is = is - 2;
            js = js - 1;
            arr[i] = 1;
            i = i + 1;
            count  = count + 1;
        }
        if(is == ie && js < je && (abs(js - je) != 2)  )
        {
            is = is - 2;
            js = js + 1;
            arr[i] = 2;
            i = i +1;
            count  = count + 1;
        }
        
        if(is == ie && js > je && (abs(js - je) != 2))
        {
            is = is + 2;
            js = js - 1;
            arr[i] = 5;
            i = i + 1;
            count  = count + 1;
        }
        if(is == ie && js > je && (abs(js - je) == 2)  )
        {
            js = js - 2;
            count = count + 1;
            arr[i] = 6;
            i = i + 1;
        }
        if(is == ie && js == je)
        {
            flag = 1;
            break;
        }
        if(is >= n || js >= n || is < 0 || js < 0)
        {
            flag = 0;
            break;
        }

    }
    for(int j=0;j<i;j++)
    {
        for(int k= j+1;k<i;k++)
        {
            if(arr[j] > arr[k])
            {
                int temp = arr[k];
                arr[k] = arr[j];
                arr[j]= temp;
            }
        }
    }
    if(flag == 1)
    {
        printf("%d\n",count);
        for(int j=0;j<i;j++)
        {
           switch(arr[j])
           {
                case 1:printf("UL ");
                break;
                case 2:printf("UR ");
                break;
                case 3:printf("R ");
                break;
                case 4:printf("LR ");
                break;
                case 5:printf("LL ");
                break;
                case 6:printf("L ");
                break;

           }
        }
        printf("\n");
    }
    else
    {
        printf("Impossible");
    }
    return 0;
}