#!/bin/python3

import sys

def block1(x1,y1,x2,y2):
    l = []
    while x1>x2 and [x1,y1]!=[x2,y2]:
    	if y1>=y2:
            x1 = x1 - 2
            y1 = y1 - 1
            l.append("UL")
    	elif y1<y2:
            x1 = x1 - 2
            y1 = y1 + 1
            l.append("UR")
    if y1>y2 and (y1-y2)%2==0:
    	while y1>y2:
    		y1 = y1 - 2
    		l.append("L")
    elif y2>y1 and (y2-y1)%2==0:
        while y1<y2:
            y1 = y1 + 2
            l.append("R")
    if [x1,y1]!=[x2,y2]:
    	return ("Impossible")
    else:
        return l
    
def block2(x1,y1,x2,y2):
    l = []
    while x1<x2 and [x1,y1]!=[x2,y2]:
    	if y1>y2:
            x1 = x1 + 2
            y1 = y1 - 1
            l.append("LL")
    	elif y1<=y2:
            x1 = x1 + 2
            y1 = y1 + 1
            l.append("LR")
    if y1>y2 and (y1-y2)%2==0:
    	while y1>y2:
    		y1 = y1 - 2
    		l.append("L")
    elif y2>y1 and (y2-y1)%2==0:
        while y1<y2:
            y1 = y1 + 2
            l.append("R")
    if [x1,y1]!=[x2,y2]:
    	return ("Impossible")
    else:
    	return l
        
def block3(x1,y1,x2,y2):
    l = []
    while x1>x2 and [x1,y1]!=[x2,y2]:
    	if y1<=y2:
            x1 = x1 - 2
            y1 = y1 + 1
            l.append("UR")
    	elif y1>y2:
            x1 = x1 - 2
            y1 = y1 - 1
            l.append("UL")
    if y1<y2 and (y2-y1)%2==0:
    	while y1<y2:
    		y1 = y1 + 2
    		l.append("R")
    elif y2<y1 and (y1-y2)%2==0:
        while y1>y2:
            y1 = y1 - 2
            l.append("L")
    if [x1,y1]!=[x2,y2]:
    	return ("Impossible")
    else:
    	return l
        
def block4(x1,y1,x2,y2):
    l = []
    while x1<x2 and [x1,y1]!=[x2,y2]:
    	if y1<y2:
            x1 = x1 + 2
            y1 = y1 - 1
            l.append("LL")
    	elif y1>=y2:
            x1 = x1 + 2
            y1 = y1 + 1
            l.append("LR")
    if y1<y2 and (y2-y1)%2==0:
    	while y1<y2:
    		y1 = y1 + 2
    		l.append("R")
    elif y2<y1 and (y1-y2)%2==0:
        while y1>y2:
            y1 = y1 - 2
            l.append("L")
    if [x1,y1]!=[x2,y2]:
    	return ("Impossible")
    else:
    	return l

def printShortestPath(n, i_start, j_start, i_end, j_end):
    if i_start>=i_end and j_start>=j_end:   #block1
        if block1(i_start, j_start, i_end, j_end)!="Impossible":
            print(len(block1(i_start, j_start, i_end, j_end)))
            print(" ".join(block1(i_start, j_start, i_end, j_end)))
        else: 
            print("Impossible")
    elif i_start>=i_end and j_start<j_end:   #block3
        if block3(i_start, j_start, i_end, j_end)!="Impossible":
            print(len(block3(i_start, j_start, i_end, j_end)))
            print(" ".join(block3(i_start, j_start, i_end, j_end)))
        else: 
            print("Impossible")
    elif i_start<i_end and j_start>=j_end:   #block2
        if block2(i_start, j_start, i_end, j_end)!="Impossible":
            print(len(block2(i_start, j_start, i_end, j_end)))
            print(" ".join(block2(i_start, j_start, i_end, j_end)))
        else: 
            print("Impossible")
    elif i_start<i_end and j_start<j_end:    #block4
        if block4(i_start, j_start, i_end, j_end)!="Impossible":
            print(len(block4(i_start, j_start, i_end, j_end)))
            print(" ".join(block4(i_start, j_start, i_end, j_end)))
        else: 
            print("Impossible")
            
if __name__ == "__main__":
    n = int(input().strip())
    i_start, j_start, i_end, j_end = input().strip().split(' ')
    i_start, j_start, i_end, j_end = [int(i_start), int(j_start), int(i_end), int(j_end)]
    printShortestPath(n, i_start, j_start, i_end, j_end)