N = int(input()) 

for i in range(N):
    for x in range(1, N+1):
        if x % 2 == 1:
            print("* ", end="") 
    print("")
    
    for x in range(1, N+1):
        if x % 2 == 0:
            print(" *", end="")
    print("")

def solution(arr):
    answer = []
    for i in range(len(arr)):
        if arr[i:i+1] == arr[i+1:i+2]:
            continue
        else:
            answer.append(arr[i])
    return answer

def solution(arr):
    answer = sum(arr) / len(arr)
    return answer

 

N = int(input())

for i in range(1, N+1):
    print(" " * (i-1) + "*" * (2*(N-i)+1))
for x in range(1, N):
    print(" " * (N-x-1) + "*" * (2*x+1))

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