a-do aaaa aaab aaad aaal aaap aaba aabb aabd aabl aabp aada aala aald aall aalo aaoo aapa aapl aapo abaa abab abad abal abap abb- abba abbb abbo abda abdo abla ablo aboa abob abod abol aboo abpa abpd abpp adaa adab adad adal adao adap adba adda addd addl addo adob adod adoo adp- al-p alaa alad alal alao alap alb- alba albo ald- alda aldl aldo all- alla alll allo aloa alod alol aloo alop alpa alpl alpo aoba aola aopo apal apao apap apba apda apdd apl- apla aplp apo- apod apoo apop appa appd appl baaa baad baal baba babb babo bada badb badd bado bala bald ball balo baol bapa bapp bbad bbbb bbdd bbdo bblb blaa blab blad blob blod bloo blop boab boad boal boba bobb bobo boda bodb bodo bola bold boll bolo boob bood bool boop bopa bopp bpda d-bo daab daad daal daap daba dabb dabo dabp dada dado dala dall dalo dapa dapp dblp dbpd dddd ddpo dlab dlbd doab doal doap doba dobb dobl dod- doda dodd dodo dola dold doll dolo dolp doob dood dool doop dopa dopo dopp dpaa dpll dppa laaa laad laal laap laba labo lada ladd lado ladp lala lald lall lalo lapa lapb lapd lapp lddp llao lldb lldp llll lloa llod lloo load loap lob- loba lobb lobo loda lola lold loll lolo loob lood lool loop lopa lopp lpda lpla lpod lppl oall obad obal obba obbo obla obol odal odbo odda oddd odla odoo odop olba olbo oldb olla ollo ooaa ooba ooda oola oold oolo oooo opal opap opla opo- oppa oppo paal paap paba pada padd pado pala pall palo palp papa papb papp pbpa pdpa plaa plab plad plap plob plod ploo plop plpa plpp poad poba pobo pod- poda podd podo pola pold poll polo pood pool poop pop- popa popo popp ppad ppal ppap pplo ppoa ppod pppa pppd pppo pppp