import sys

n, k, sr, sc, tr, tc = map(int, sys.stdin.buffer.read().split())
length = abs(sr - tr) + abs(sc - tc)
if not (length <= k <= 2 * length and (k - length) % 2 == 0):
    print(-1)
else:
    extra = k - length
    print("\n".join("".join("#" if (d := abs(r - sr) + abs(c - sc)) <= extra and d % 2 else "." for c in range(1, n + 1)) for r in range(1, n + 1)))