Description

A third-order X pattern is:

X X
 X
X X

A fifth-order X pattern is:

X   X
 X X
  X
 X X
X   X

No extra spaces are needed at the end of each line. Now, please output an n-order X pattern.

Input Format

An odd integer n (3≤n≤499).

Output Format

Output the n-order X pattern.

Sample

3

X X
 X
X X