#!/bin/python3

import sys


def printShortestPath(n,x1,y1,x2,y2,board):
    moves=[]
    N1=range((x2-1),(x2+1))
    N2=range((y2-1),(y2+1))
    while(((x1 and y1) != (x2 and y2)) and (((x1 and y1) >= 0) and ((x1 and y1) <= n))):
        if ((x1 in N1) and (y1 in N2)):
            return 'Impossible'
        else:
            if((x1 < x2) and (y1 == y2) and (x1 < n-2)):
                moves.append('LR')
                x1+=2
                y1+=1
            if((x1 < x2) and (y1 == y2) and not (x1 < n-2)):
                moves.append('LL')
                x1+=2
                y1-=1
            if ((x1 < x2) and (y1 < y2)):
                moves.append('LR')
                x1+=2
                y1+=1
            if ((x1 < x2) and (y1 > y2)):
                moves.append('LL')
                x1+=2
                y1-=1

            if((x1 > x2) and (y1 > y2)):
                moves.append('UL')
                x1-=2
                y1-=1
            if ((x1 > x2) and (y1 < y2)):
                moves.append('UR')
                x1-=2
                y1+=1
            if ((x1 > x2) and (y1==y2) and (y1 > 2)):
                moves.append('UL')
                x1-=2
                y1-=1
            if ((x1 > x2) and (y1==y2) and not (y1 > 2)):        
                moves.append('UR')
                x1-=2
                y1+=1
            if((x1 == x2) and (y1 < y2)):
                moves.append('R')
                y1+=2
            if ((x1 == x2) and (y1 > y2)):
                moves.append('L')
                y1-=2

    if ((x1==x2) and (y1==y2)):
        return moves        
    else:
        return 'Impossible'
    
if __name__ == "__main__":
    n = int(input().strip())
    x1, y1, x2, y2 = input().strip().split(' ')
    x1, y1, x2, y2 = [int(x1), int(y1), int(x2), int(y2)]
    
    board = [[0 for x in range(n)] for y in range(n)]
    #board[n][n]
    
#    for i in range (0,n):
#        for j in range (0,n):
#            print (board[i][j],end=" ")
#        print('\n')
    moves=printShortestPath(n,x1,y1,x2,y2,board)
    if ('Impossible' in moves):
        print (moves)
    else:
        print (len(moves))
        for i in range(len(moves)):
            print (moves[i],end=" ")