import sys

from typing import List, Tuple

int1 = lambda x: int(x) - 1
input = lambda: sys.stdin.readline().rstrip('\n')
ii = lambda: int(input())
vi = lambda: list(map(int, input().split()))
vi1 = lambda: list(map(int1, input().split()))


def dbg(*args, **kwargs):
    print(*(repr(arg) for arg in args), *(f'{k}: {repr(v)}' for k, v in kwargs.items()),
          sep='; ', file=sys.stderr, flush=True)


def main():
    n, k = vi()
    sr, sc = vi1()
    tr, tc = vi1()
    d = abs(sr - tr) + abs(sc - tc)
    if not (d <= k <= 2 * d):
        return -1
    if not (k - d) % 2 == 0:
        return -1
    ans = [['.'] * n for _ in range(n)]

    cd = d * 2
    for i in range(n):
        for j in range(n):
            if (i + j) % 2 != (sr + sc) % 2:
                ans[i][j] = '#'
    if ans[tr][tc] == '#':
        ans[tr][tc] = '.'
        cd -= 1
    while (sr, sc) != (tr, tc) and cd != k:
        if sr < tr:
            sr += 1
        if sr > tr:
            sr -= 1
        if ans[sr][sc] == '#':
            ans[sr][sc] = '.'
            cd -= 2
            continue
        if sc < tc:
            sc += 1
        if sc > tc:
            sc -= 1
        if ans[sr][sc] == '#':
            ans[sr][sc] = '.'
            cd -= 2
            continue

    for i in ans:
        print(''.join(i))

    return None


def _start():
    if (ret := main()) is not None:
        print(*ret) if isinstance(ret, List) or isinstance(ret, Tuple) else print(ret)


if __name__ == '__main__':
    _start()