I find it difficult to explain what I want, so I created a mockup https://i.sstatic.net/2WHA7.png
How can I achieve this layout using bootstrap 4? The goal is to have the four elements on the right always be equal in height (except on mobile) like the element on the left (image). Can anyone help with this? Here is the current markup.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8>
<title>Document</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
</head>
<body>
<div class="container>
<section class="hero">
<div class="row>
<div class="col col-md-8"><img src="http://placehold.it/700x300/ccc/333.png?text=placeholder" alt=""></div>
<div class="col col-md-4">
<div class="contentMy>somthing</div>
<div class="contentMy>somthing</div>
<div class="contentMy>somthing</div>
<div class="contentMy>somthing</div>
</div>
</div>
</section>
</div>
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
</body>
</html>