New York Street Sweeper Paths

<?xml version="1.0" encoding="UTF-8"?>
<!-- children of root: all the vertices -->
<!-- grandsons of root: possible next vertices in the path after parent -->
<root>
    <F>
        <next  id="I" />
        <next  id="E" />
    </F>
    <I>
        <next  id="H" />
    </I>
    <H>
        <next  id="G" />
    </H>
    <G>
        <next  id="H" />
        <next  id="D" />
    </G>
    <D>
        <next  id="E" />
        <next  id="A" />
    </D>
    <A>
        <next  id="D" />
        <next  id="B" />
    </A>
    <B>
        <next  id="A" />
        <next  id="E" />
        <next  id="C" />
    </B>
    <C>
        <next  id="B" />
        <next  id="F" />
    </C>
    <E>
        <next  id="B" />
        <next  id="F" />
        <next  id="H" />
    </E>
</root>