<!DOCTYPE html>
<style>
    .container {
        line-height: 100px;
        font: 100px/1 Ahem;
    }
    .long {
        float: left;
        width: 100px;
        height: 20px;
        margin-bottom: 10px;
        background-color: black;
        -webkit-shape-outside: inset(0 50% 0 0);
    }
    .short {
        float: left;
        width: 50px;
        height: 20px;
        clear: left;
        margin-bottom: 10px;
        background-color: black;
    }
</style>
<body>
    <div class="container">
        <div class="long"></div>
        <div class="short"></div>
        <div class="short"></div>
        XXXX
    </div>
</body>