2 alpha [ class=hypothetical ];
3 gamma [ class=hypothetical ];
4 delta [ class=hypothetical ];
5 1 [ class=hypothetical,label="*" ];
6 3 [ class=hypothetical,label="*" ];
7 4 [ class=hypothetical,label="*" ];
8 5 [ class=hypothetical,label="*" ];
9 6 [ class=hypothetical,label="*" ];
10 7 [ class=hypothetical,label="*" ];