a-do aaaa aaab aaad aaap aaba aabb aabd aabp aabt aada aadt aaoo aapa aapo aapt aata aatt abaa abab abad abap abat abb- abba abbb abbo abbt abda abdo aboa abob abod aboo abot abpa abpd abpp abta adaa adab adad adao adap adat adba adda addd addo adob adod adoo adot adp- adta aoba aopo aotd apao apap apat apba apda apdd apo- apod apoo apop apot appa appd appt apta aptt at-t ataa atab atad atap atat atdt atob atod atop atot atta atto attp baaa baad baat baba babb babo bada badb badd bado bapa bapp bapt bata bato batt bbad bbbb bbdd bbdo boab boad boat boba bobb bobo boda bodb bodo boob bood boop boot bopa bopp bota botb botd boto bott bpda bpot btaa btbp btdt btob bttb d-bo daab daad daap daba dabb dabo dabp dabt dada dado dapa dapp data dato datp datt dbpd dbtt dddd ddot ddpo doab doap doat doba dobb dod- doda dodd dodo doob dood doop doot dopa dopo dopp dopt dota dotd doto dott dpaa dpdt dppa dtaa dtap dtdp dtot dttp obad obba obbo obdt obot obtd odbo odda oddd odoo odop odot ooaa ooba ooda oooo ootb ootp opap opo- oppa oppo opto otap otbd oto- otoo otpp otta otto paap paat paba pabt pada padd pado papa papb papp pata patd pato patt pbpa pdpa poad poat poba pobo pod- poda podd podo pood poop poot pop- popa popo popp popt pota potd poto pott ppad ppap ppoa ppod pppa pppd pppo pppp ppta pptt ptab ptop ptpd taa- taat taba tabb tabo tada tado taoa tapa tapo tapp tapt tata tatb tato tatt tbta tbtp tdap tddb toab toad toat toba tobo tobt toda todd todo todt tooa tood toot top- topa topd topo topp topt tota totd toto tott tpap tppa tppd tppp tptp ttab ttbb ttop tttt