<edges xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://sumo.sf.net/xsd/edges_file.xsd">
   <edge id="1fi" from="1" to="m1" type="b"/>
   <edge id="1si" from="m1" to="0" type="a"/>
   <edge id="1o" from="0" to="1" type="c"/>

   <edge id="2fi" from="2" to="m2" type="b"/>
   <edge id="2si" from="m2" to="0" type="a"/>
   <edge id="2o" from="0" to="2" type="c"/>

   <edge id="3fi" from="3" to="m3" type="b"/>
   <edge id="3si" from="m3" to="0" type="a"/>
   <edge id="3o" from="0" to="3" type="c"/>

   <edge id="4fi" from="4" to="m4" type="b"/>
   <edge id="4si" from="m4" to="0" type="a"/>
   <edge id="4o" from="0" to="4" type="c"/>

</edges>
