from sys import *
setrecursionlimit(1000000)
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)]
f=[[(1000000,0)]*n for _ in range(n)]
f[i_start][j_start]=(0,i_start,j_start,"")

def go(c,i,j):
    global f
    if c>100: return
    def add(ni,nj,s):
        if 0<=ni<n and 0<=nj<n and f[ni][nj][0]>c+1: 
            f[ni][nj]=(c+1,i,j,s)
            go(c+1,ni,nj)
    add(i-2,j-1,"UL")
    add(i-2,j+1,"UR")
    add(i,j+2,"R")
    add(i+2,j+1,"LR")
    add(i+2,j-1,"LL")
    add(i,j-2,"L")

go(0,i_start,j_start)
if f[i_end][j_end][0]==1000000: 
    print("Impossible")
else:
    ans,i,j=[],i_end,j_end
    while True:
        c,ii,jj,s=f[i][j]
        if i==ii and j==jj:break
        ans+=[s]
        i,j=ii,jj
    print(f[i_end][j_end][0])
    print(' '.join(ans[::-1]))