## X by Vim Lover

b=input()
a=b/2
c=[" "*i+"X"+" "*(b+2*~i)+"X" for i in range(a)]
print"\n".join(c)+"\n"+" "*a+"X"+"\n"+"\n".join(c[::-1])

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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