n=int(input())
i=0
while i < n :
    j=0
    while j < n :
        if i == 0 or i == n-1 or j ==0 or j==n-1 or (j==n//2 and i ==n//2) or j==i or j+i==n-1:
            print("*",end="")
        else:
            print(" ",end="")
        j+=1
    print("")
    i+=1