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