public class Solution
 {
     public static void main(String[] args)
     {
         int count = 0;

         for(int i = 1; i <= 7; i++)
         {
             for(int j = i + 1; j <= 7; j++)
             {
                 System.out.println(i + "\t" + j);
                 count++;
             }
         }

         System.out.println("Total groups number is " + count);
     }
 }