a-be aaaa aaab aaad aaae aaaf aaal aaba aabb aabd aabl aada aade aaea aafa aafb aafd aaff aafl aala aald aale aall abaa abab abad abae abaf abal abb- abba abbb abbe abda abed abee abel abff abla able adaa adab adad adae adal adba adda addd adde addl adea adeb adee adel adfa adfl adle aeaf aede aela afaa afad afdb afdl afee afel affa afla afle alaa alad alae alal alb- alba albe ald- alda alde aldl alea aled alee alef alfa alfe all- alla alle alll baaa baad baaf baal baba babb babe bada badb badd bade baed bael baff bala bald bale balf ball bbad bbbb bbdd bbeb bblb bdle bead beaf beal beba bebb bebe beda bede bedl beeb beed beef beel befa befe beff bela beld bele bell bffl blaa blab blad blae blea bleb bled blee daab daad daae daal daba dabb dada dade daeb dafa dafe daff dala dale dalf dall dddd dead deae deaf deal deba debe deda dedd dede deeb deed deef deel defe deff dela deld dele delf dell dfaf dffa dlab dlbd e-la eaaf eaba eada eadb eadd eafb eala eald eale ebal ebba ebed ebel ebla edad edda edde ede- edea edel edfa edfl edla edle eede eeea eeee eefa eefe eefl eele efab efda effa efla el-b elab elad elal elba elbe elda elde elea eled elee elef elfa elfe ella elle faaa faad faba fabd fabe fada fadd fade faeb fafa fafe faff fala fald fale fall fbla fble fead feaf feal feba feda fede feeb feed feel fefe feff fela feld fele felf fell ffee ffff flab flad flae flea fled flee laaa laad laal laba labe lada ladd lade lael lafb lafe laff lala lald lale lall leaa lead leaf leal leba lebd leda lede leea leed leef leel lefa lefe leff lela lele lell lldb llef llll