n,m=map(int,input().split())
i=0
while i<n :
    j=0
    while j<m :
        if i%2==0 or ((i-1)%4==0 and j==m-1) or ((i-3)%4==0 and j==0) :
            print("#",end="")
        else :
            print("*",end="")
        j+=1
    print()
    i+=1