n, m = map(int, input().split())


for i in range(n):
    s = 0
    for j in range(m):
        if i == 0 or i%2 == 0:
            print("#", end = "")
        if i == n-1 or i%2 != 0:
            if j == 0 and i%4 != 1:
                 print("#", end = "")
              
            elif i%4 == 1 and j == m - 1:
                print("#", end = "")
            else:
                print("*", end = "")
    print()

# flag