hdu2665 java

import java.util.Scanner;




public class P2565 {


public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int t=sc.nextInt();
while(t-->0){
int n=sc.nextInt();
print(n);
System.out.println();
}


}


private static void print(int n) {
for(int i=0;i<n;i++){
for(int j=0;j<n;j++){
if(i==j||Math.abs(j+i)==n-1){
System.out.print("X");
}else if(j<=i||Math.abs(j+i)<=n-1){
System.out.print(" ");
}
}
System.out.println();
}
}


}