/usr/share/doc/tree-puzzle-doc/examples/marswolf.ctrees is in tree-puzzle-doc 5.2-7ubuntu1.
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1 2 3 4 | (Thylacinus,((((Sarcophilu,Dasyurus),Echymipera),(Philander,Bos)),(Trichosuru,Phalanger)));
(Thylacinus,(((Sarcophilu,Dasyurus),(Echymipera,(Philander,Bos))),(Trichosuru,Phalanger)));
(Thylacinus,((((Sarcophilu,Dasyurus),(Philander,Bos)),Echymipera),(Trichosuru,Phalanger)));
(Thylacinus,(((Sarcophilu,Dasyurus),((Echymipera,Philander),Bos)),(Trichosuru,Phalanger)));
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