import sys
from Queue import Queue
if sys.version_info[0]<=2:
	range=xrange
	input=raw_input

def solve0(n,p):
	start=(p[1],p[0])
	end=(p[3],p[2])
	if start==end:
		return []
	movedir=((-1,-2),(1,-2),(2,0),(1,2),(-1,2),(-2,0))
	grid=[[None]*n for i in range(n)]
	queue=Queue()
	queue.put(start)
	grid[start[1]][start[0]]=(None,None)
	while not queue.empty() and grid[end[1]][end[0]]==None:
		pos=queue.get()
		for m in range(6):
			dir=movedir[m]
			x,y=pos[0]+dir[0],pos[1]+dir[1]
			if x>=0 and x<n and y>=0 and y<n and grid[y][x]==None:
				grid[y][x]=(m,pos)
				queue.put((x,y))
	if grid[end[1]][end[0]]==None:
		return None
	arr=[]
	pos=end
	while pos!=start:
		m,pos=grid[pos[1]][pos[0]]
		arr.append(m)
	return arr[::-1]

n=int(input().strip())
p=map(int,input().strip().split())
m=solve0(n,p)
movestr=["UL","UR","R","LR","LL","L"]
if m is None:
	print("Impossible")
else:
	print(len(m))
	print(" ".join([movestr[i] for i in m]))