<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Example</title>
<link rel = stylesheet href = https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css>
<script src = https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js></script>
<script src = https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js></script>
</head>
<body>
<div style = padding: 100px 100px 10px;>
<form class = bs-example bs-example-form role = form>
<div class = input-group input-group-lg>
<span class = input-group-addon>@</span>
<input type = text class = form-control placeholder = Twitterhandle>
</div>
<br>
<div class = input-group>
<span class = input-group-addon>@</span>
<input type = text class = form-control placeholder = Twitterhandle>
</div>
<br>
<div class = input-group input-group-sm>
<span class = input-group-addon>@</span>
<input type = text class = form-control placeholder = Twitterhandle>
</div>
</form>
</body>
</html>
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