#include<iostream> using namespace std; int main() { int n,m; cin >> m; for(int i = 1 ;i <= m;i++) { cin >>n; for(int i = 1;i <= n;i++) { for(int j = 1;j <= n;j++) { if(i == j || j == n-i+1) { cout <<"X"; if(j >= n/2+1) break; } else cout <<" "; } cout << endl; } cout <<endl; } return 0; }