<!-- Already indented, and should stay so.. -->

<mixedContent>

    <p>char1<span/></p>

    <p><span/>char2</p>

    <p>char3<span/>char3</p>

    <p>

        <e1>

            char 4

        </e1>

        <e2>

            <p>char1<span/></p>

            <p><span/>char2</p>

            <p>char3<span/>char3</p>

        </e2>

    </p>

</mixedContent>