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