4 [block-level comment in the TAXA block]
6 taxlabels A B C D E F G H;
10 [block-level comment in the CHARACTERS block]
13 format datatype=protein missing=? gap=-;
27 [block-level comment in the TREES block]
29 tree ladder = (((((((A:1,B:1):1,C:2):1,D:3):1,E:4):1,F:5):1,G:6):1,H:7);