N, K = map(int, input().split())
Sr, Sc = map(lambda x: int(x)-1, input().split())
Tr, Tc = map(lambda x: int(x)-1, input().split())

dist = abs(Sr - Tr) + abs(Sc - Tc)

if dist % 2 != K % 2 or dist > K:
  print(-1)
  exit()

x = (Sr + Sc) % 2
ans = [["."]*N for _ in range(N)]

for i in range(N):
  for j in range(N):
    if (i, j) != (Sr, Sc) and (i, j) != (Tr, Tc):
      ans[i][j] = "." if (i+j)%2 == x else "#"

y = dist // 2 * 4 + dist % 2

if Sc <= Tc:
  for j in range(Sc+1, Tc+1, 2):
    if y == K:
      break
    ans[Sr][j] = "."
    y -= 2
else:
  for j in range(Sc-1, Tc-1, -2):
    if y == K:
      break
    ans[Sr][j] = "."
    y -= 2

if Sr <= Tr:
  for i in range(Sr+1, Tr+1, 2):
    if y == K:
      break
    ans[i][Tc] = "."
    y -= 2
else:
  for i in range(Sr-1, Tr-1, -2):
    if y == K:
      break
    ans[i][Tc] = "."
    y -= 2

for x in ans:
  print("".join(x))