a-be aaaa aaab aaae aaba aabb aaea aage aaoe aaoo abaa abab abae abag abb- abba abbb abbe abbo abee aboa abob aboo aega ag-o agag agao agba agbo agea agee agga agge agob agog agoo aoba baaa baba babb babe babo baga bage bagg bago bbbb bbeb bbga beag beba bebb bebe bebo beeb beeg bega begg bego beo- boab boag boba bobb bobe bobo boea boee boeo boga boge bogg bogo boob booe boog eaba eaga eage ebba ebbo eboe eboo eeea eeee eega egaa egae egao egba egbe egea egee eggb egge eggo ego- gaba gabb gabe gabo gaea gaga gage gagg gago gbag gbbo geab geba gebe gege gegg gego geo- geog gggg goba gobe gobo goga gogo goog o-eo obba obbo obea oboe oegb ogae ogb ogba ogbe ogea ogee ogge ogoa ogog ooaa ooba oobe oooo