#include <bits/stdc++.h> using namespace std; int a,b; int main(){ cin>>b; while(b--){ cin>>a; for(int i=1;i<=a/2;i++){ for(int j=1;j<i;j++) cout<<" "; cout<<"X"; for(int j=1;j<=a-2*i;j++) cout<<" "; cout<<"X"; cout<<endl; } for(int i=1;i<=a/2;i++) cout<<" "; cout<<"X"; cout<<endl; for(int i=a/2;i>=1;i--){ for(int j=1;j<i;j++) cout<<" "; cout<<"X"; for(int j=1;j<=a-2*i;j++)cout<<" "; cout<<"X"; cout<<endl; } cout<<endl; } return 0; }