a= int(input())
line= 2*a-1
star= 1
space= a-1
for i in range(line):
    if i==a:
        star2= star-2
        line2= a-1
        space2= a-2
        break
    print(" "*space,"*"*star,end= "")
    print()
    star+=2
    space-=1

for j in range(line2):
    print(" "*space2,"*"*star2,end= "")
    print()
    space2+=1
    star-=1