a-be aaaa aaab aaad aaae aaba aabb aabd aada aade aaea aage abaa abab abad abae abag abb- abba abbb abbe abda abed abee abgd adaa adab adad adae adag adba adda addd adde adea adeb adee aede aega agad agag agba agda agde agea aged agee agga agge baaa baad baba babb babe bada badb badd bade baed baga bage bagg bbad bbbb bbdd bbeb bbga bead beag beba bebb bebe beda bede beeb beed beeg bega begg daab daad daae daag daba dabb dada dade daeb daga dage dagg dbag dddd dead deae deba debe deda dedd dede deeb deed deeg dega dege dgeg dgge eaba eada eadb eadd eaga eage ebba ebed edad edag edda edde ede- edea edge eede eeea eeee eega egaa egad egae egba egbe egea egee eggb egge gaba gabb gabe gada gadd gade gaea gaed gaga gage gagg gbag gbde gddb geab gead geba gebe geda gedd gede geed gege gegg gggg