aaaa aaab aaba aabb aabt aaoo aata aatt abaa abab abag abat abb- abba abbb abbo abbt aboa abob aboo abot abta ag-o agag agao agat agba agbo agga agob agog agoo agot agta aoba at-t ataa atab atat atgo atob atot atta atto baaa baat baba babb babo baga bagg bago bagt bata bato batt bbbb bbga boab boag boat boba bobb bobo boga bogg bogo bogt boob boog boot bota botb boto bott btaa btob bttb gaba gabb gabo gabt gaga gagg gago gata gato gatt gbag gbbo ggbt gggg goat goba gobo goga gogo goog goot gota goto gott gtaa gtta obba obbo obot ogb ogba ogoa ogog ooaa ooba oooo ootb oto- otog otoo otta otto taa- taag taat taba tabb tabo taga tagg tago taoa tata tatb tato tatt tbta toab toat toba tobo tobt toga togo togt tooa toot tota toto tott ttab ttbb tttt