title: Prolog logic task
body: <p>the rules are five students won five different places in five different disciplines - Alex, Bob, John, Deo, Sam.</p>
  <ol>
  <li><p>The language student placed higher than Bob as much as Bob placed higher than the law student.</p>
  </li>
  <li><p>The IT student placed three spots higher than John.</p>
  </li>
  <li><p>Alex placed at an even rank and the math student at an odd one.</p>
  </li>
  <li><p>Sam placed two places below the physicist.</p>
  </li>
  </ol>
  <p>Who placed where and what do they study?</p>
  <p>How do I go about accounting for the two unknowns in the conditions?</p>