Z0:0 Z1:0
start: .deref p X
       .testH X print -1
print: .out X
       .add p BASE p
       0 0 start
       p:H X:0
       H:72 101 108
       108 111 44
       32 87 111
       114 108 100
       33 10 -1
       .include lib.bbj