<?xml version="1.0" encoding="UTF-8"?>
<out>id0,  id0
id1,  id1
id2,  id2
id3,  id3
id4,  id4
id5,  id5
id6,  id6
id7,  id7

== apply above, call below ==
id0,  id0
id1,  id1
id2,  id2
id3,  id3
id4,  id4
id5,  id5
id6,  id6
id7,  id7
</out>