def main():
    n, k = list(map(int, input().split()))
    sy, sx = list(map(lambda x: int(x)-1, input().split()))
    ty, tx = list(map(lambda x: int(x)-1, input().split()))
    if k % 2: return [[]]
    Ans = [["." for _ in range(n)] for _ in range(n)]
    if sx > tx:
        sy, sx, ty, tx = ty, tx, sy, sx
    l = abs(sy-ty)+abs(sx-tx)
    r = l+l//2*2
    if l <= k <= r:
        s = (k-l)//2
        for y in range(n):
            for x in range(n):
                t = abs(sy-y)+abs(sx-x)
                if t % 2 and t//2 < s:
                    Ans[y][x] = "#"
        return Ans
    else:
        return [[]]

Ans = main()
if Ans[0]:
    for ans in Ans:
        print("".join(ans))
else:
    print(-1)