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

i = 0
mm = 0


while i < m:

    if i % 2 == 0:
        j = 0
        while j < n:
            print("#",end="")
            j += 1
        print()
    elif i % 2 == 1:
        if mm % 2 == 0:
            j = 0
            while j < n-1:
                print("*",end="")
                j += 1
            print("#")
            mm += 1
        else:
            j = 0
            print("#",end="")
            while j < n-1:
                print("*",end="")
                j += 1
            print()
            mm -= 1
    i += 1