from collections import defaultdict
from itertools import product

n = int(input())
x1, y1, x2, y2 = map(int, input().strip().split())
start, end = (x1, y1), (x2, y2)

dist = defaultdict(lambda: float('inf'))
dist[end] = 0

for _ in range(n*n+1):
    unchanged = True
    for x, y in product(range(n), range(n)):
        val = 1+min(dist[  x,y-2],
                    dist[x+2,y+1],
                    dist[x-2,y-1],
                    dist[  x,y+2],
                    dist[x-2,y+1],
                    dist[x+2,y-1])
        if val < dist[x,y]:
            dist[x,y] = val
            unchanged = False
    if unchanged:
        break


if dist[start] == float('inf'):
    print('Impossible')
else:
    x, y = start
    path = []
    while (x,y) != end:
        d = dist[x, y]
        if dist[x-2, y-1] == d-1:
            path.append('UL')
            x, y = x-2, y-1
        elif dist[x-2, y+1] == d-1:
            path.append('UR')
            x, y = x-2, y+1
        elif dist[x, y+2] == d-1:
            path.append('R')
            x, y = x, y+2
        elif dist[x+2, y+1] == d-1:
            path.append('LR')
            x, y = x+2, y+1
        elif dist[x+2, y-1] == d-1:
            path.append('LL')
            x, y = x+2, y-1
        elif dist[x, y-2] == d-1:
            path.append('L')
            x, y = x, y-2
    print(dist[start])
    print(*path, sep=' ')