using System;
public class Program
{
public static void Main()
int n = 15;
int d = (n * 2) - 2;
int z = (d / 2) + d;
int x = (n - 1);
for (int i = 0; i <= d; i++)
for (int j = 0; j <= d; j++)
if (i + j == z)
Console.Write("x");
}
else if (i + j == n - 1)
else if (i + j == x)
else
Console.Write(" ");
if (x < z)
x += 2;
x = n + 1;
Console.WriteLine();