a-do aaaa aaab aaad aaal aaba aabb aabd aabl aada aala aald aall aalo aaoo abaa abab abad abal abb- abba abbb abbo abda abdo abla ablo aboa abob abod abol aboo adaa adab adad adal adao adba adda addd addl addo adob adod adoo alaa alad alal alao alb- alba albo ald- alda aldl aldo all- alla alll allo aloa alod alol aloo aoba aola baaa baad baal baba babb babo bada badb badd bado bala bald ball balo baol bbad bbbb bbdd bbdo bblb blaa blab blad blob blod bloo boab boad boal boba bobb bobo boda bodb bodo bola bold boll bolo boob bood bool d-bo daab daad daal daba dabb dabo dada dado dala dall dalo dddd dlab dlbd doab doal doba dobb dobl dod- doda dodd dodo dola dold doll dolo doob dood dool laaa laad laal laba labo lada ladd lado lala lald lall lalo llao lldb llll lloa llod lloo load lob- loba lobb lobo loda lola lold loll lolo loob lood lool oall obad obal obba obbo obla obol odal odbo odda oddd odla odoo olba olbo oldb olla ollo ooaa ooba ooda oola oold oolo oooo