title: How to find the second lowest and second highest number in a user-inputted list using loops and no arrays
body: <p>For my program, I need to find the highest pair and lowest pair from 8 user-inputted ints, I am required to use a loop and no arrays.
  Ex. 6, 7, 8, 9, 10, 11, 12, 13 should return: (13, 12) , (6, 7)</p>
  
  <p>How should I go about finding the second highest and second lowest number using a loop?</p>