import java.util.*;
public class Main{

  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    int t= sc.nextInt();

    while(t-->0){

     Set<Integer> s =new HashSet<Integer>();
      long n = sc.nextInt();

      int k,l;
      int j;
      for(int i = 1; i <n; i++){
          

        for(j = 1; j<n; j++){

          if(i!=j){
            System.out.println(i+" "+j);




          }

                            }
        System.out.println();
        }
      
  

        }
        
    }

    }