1<?xml version="1.0" encoding="UTF-8"?> 2<out>: Test for source tree numbering 31: Level A 41+1: Level B 51+2: Level B 61+2-1: Level C 71+3: Level B 81+3-1: Level C 91+3-1-1: Level D 102: Level A 112+1: Level B 122+1-1: Level C 132+1-1-1: Level D 142+1-1-1-1: Level E 153: Level A 163+1: Level B 173+1-1: Level C 183+1-1-1: Level D 193+1-1-1-1: Level E 203+1-1-2: Level D 213+1-1-2-1: Level E 223+1-2: Level C 233+1-2-1: Level D 243+2: Level B 25</out>