int x [10], y[10];
   int counterr=0;
   cout << "Enter the first 10 numbers: " <<endl;
   for (int k=0; k<=9; k++)
   {
       cin>> x[k];
   }
   cout << "Enter the second 10 numbers: " <<endl;
   for (int counterr=0; counterr<=9; counterr ++)
   {
       cin >> y[counterr];
   }
   for (int i=0; i<=9; i++)
   {
       for (int o=0; o<=9; o++)
       {
           if( x[k] == y[counterr] )
           {
               o++;
               cout << x[k] << "its index is: " << k << endl;
               cout << y[counterr] <<"its index is: " <<counterr <<endl;
           }

       }
   }