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                     Box
           Response  1          2        3
Red/Green  yes/no    Red/Green  Red/Red  Green/Red
           no/yes    Red/Green  Red/Red  Green/Red

use strict;
use warnings;
...

print dumpTree( randomTree( @t1 ), 1 );
print dumpTree( randomTree( @t2 ), 3, 1 );