n = int(raw_input())\x0d half = n/2\x0d loop =range(half)\x0d loop.reverse()\x0d loop=range(half+1)+loop\x0d for i in loop:\x0d if i==half:\x0d print ' '*(n/2)+'X'\x0d else:\x0d print ' '*i+'X'+' '*(n-(i+1)*2)+'X'\x0d \x0d \x0d
Note that non-ascii characters in the above source code will be escaped (such as \x9f).