<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
span {
display: inline-block;
width: 9em;
text-align: center;
border: 1px solid green;
white-space: normal;
word-break: break-word;
padding: 60px 0;
}
</style>
</head>
<body>
<span>
This is a vertically aligned text.
</span>
</body>
</html>