a-be aaaa aaab aaad aaae aaaf aaba aabb aabd aada aade aaea aafa aafb aafd aaff aage abaa abab abad abae abaf abag abb- abba abbb abbe abda abed abee abff abgd adaa adab adad adae adag adba adda addd adde adea adeb adee adfa aeaf aede aega afaa afad afdb afee affa afgf agad agag agba agda agde agea aged agee agfa agga agge baaa baad baaf baba babb babe bada badb badd bade baed baff baga bage bagg bbad bbbb bbdd bbeb bbga bead beaf beag beba bebb bebe beda bede beeb beed beef beeg befa befe beff bega begg bfgf daab daad daae daag daba dabb dada dade daeb dafa dafe daff daga dage dagg dbag dddd dead deae deaf deba debe deda dedd dede deeb deed deef deeg defe deff defg dega dege dfaf dffa dgeg dgge eaaf eaba eada eadb eadd eafb eaga eage ebba ebed edad edag edda edde ede- edea edfa edge eede eeea eeee eefa eefe eega ef-g efab efda effa egaa egad egae egba egbe egea egee eggb egge faaa faad faba fabd fabe fada fadd fade faeb fafa fafe faff fafg fage fagg fead feaf feba feda fede feeb feed fefe feff fege fegg ffee ffff gaba gabb gabe gada gadd gade gaea gaed gafa gafb gaff gaga gage gagg gbag gbde gddb geab gead geba gebe geda gedd gede geed gefe gege gegg gffa ggfg gggg