Problem Description

A checkerboard of size n is depicted as below:

n = 1
o

n = 2
ox
xo
 
n = 3
oxo
xox
oxo

n = 4
oxox
xoxo
oxox
xoxo

n = 5
oxoxo
xoxox
oxoxo
xoxox
oxoxo

Your task is to print the checkerboard given the size of the checkboard, n

Input

A single integer, n, where n will not exceed 50.

Output

The checkboard, refer to example above

Sample Input

7

Sample Output

oxoxoxo
xoxoxox
oxoxoxo
xoxoxox
oxoxoxo
xoxoxox
oxoxoxo