Star Printing 9

Given an integer N, print an hourglass-shaped star pattern whose number of stars decreases by 2 toward the center and then increases by 2 again.

The pattern has 2 × N - 1 lines. In the upper half, each next line has one more leading space and two fewer stars. The middle line contains one star, and the lower half is symmetric with the upper half.

The first line contains an integer N.

1 ≤ N ≤ 100

Print the star pattern from the first line through line 2 × N - 1.

Do not print unnecessary spaces at the end of any line.