1<?xml version="1.0" encoding="UTF-8"?> 2<out>: Test for source tree numbering 3.A: Level A 4.A+a: Level B 5.A+b: Level B 6.A+b 1: Level C 7.A+c: Level B 8.A+c 1: Level C 9.A+c 1 1: Level D 10.B: Level A 11.B+a: Level B 12.B+a 1: Level C 13.B+a 1 1: Level D 14.B+a 1 1 1: Level E 15.C: Level A 16.C+a: Level B 17.C+a 1: Level C 18.C+a 1 1: Level D 19.C+a 1 1 1: Level E 20.C+a 1 2: Level D 21.C+a 1 2 1: Level E 22.C+a 2: Level C 23.C+a 2 1: Level D 24.C+b: Level B 25</out>