a-a a-b aaa aab aad aaf aao aar aas ab- aba abb abd abf abo abr abs ad- ada adb add adf ado adr ads af- afa afb afd aff afo afr afs aoa aob aod aof aoo aor aos ar- ara arb ard arf aro arr ars as- asa asb asd asf aso asr ass baa bab bad baf bao bar bas bba bbb bbd bbf bbo bbr bbs bda bdb bdd bdf bdo bdr bds bfa bfb bfd bff bfo bfr bfs boa bob bod bof boo bor bos bra brb brd brf bro brr brs bsa bsb bsd bsf bso bsr bss daa dab dad daf dao dar das dba dbb dbd dbf dbo dbr dbs dda ddb ddd ddf ddo ddr dds dfa dfb dfd dff dfo dfr dfs doa dob dod dof doo dor dos dra drb drd dro drr drs dsa dsb dsd dsf dso dsr dss faa fab fad faf fao far fas fba fbb fbd fbf fbo fbr fbs fda fdb fdd fdf fdo fdr fds ffa ffd fff ffo ffr ffs foa fob fof foo for fos fra frb frd frf fro frr frs fsa fsb fsd fsf fso fsr fss oaa oab oad oaf oao oar oas ob- oba obb obd obf obo obr obs oda odb odd odf odo odr ods of- ofa ofb ofd off ofo ofr ofs oo- ooa oob ood oof ooo oor oos or- ora orb ord orf oro orr ors os- osa osb osd osf oso osr oss ra- raa rab rad raf rao rar ras rba rbb rbd rbf rbo rbr rbs rda rdb rdd rdf rdo rdr rds rfa rfb rfd rff rfo rfr rfs roa rob rod rof roo ror ros rra rrb rrd rrf rrr rrs rsa rsb rsd rsf rso rsr rss saa sab sad saf sao sar sas sba sbb sbd sbf sbo sbr sbs sda sdb sdd sdf sdo sdr sds sfa sfb sfd sff sfo sfr sfs soa sob sod sof soo sor sos sr- sra srb srd srf sro srr srs ss- ssa ssb ssd ssf sso ssr sss

a-do aaaa aaab aaad aaaf aaar aaas aaba aabb aabd aada aads aafa aafb aafd aaff aaoo aara aard aaro aars aasa aasd aasf aass abaa abab abad abaf abar abas abb- abba abbb abbo abbr abbs abda abdo abff aboa abob abod abof aboo abor abos abra abro abrs abs- absa absd absf abss adaa adab adad adao adar adas adba adda addd addo addr adds adfa adfs adob adod adoo ador ados adra adro adrs adsa adso adsr adss afaa afad afao afar afbs afdb affa affo affs afoa afoo afor afr- afra afro afrs afsa afsb aoba aora aorb aors aosd aoss arab arad araf arar aras arba arbs arda ardf ardo ards arfa arfb arff arfs aroa arob arod aroo aror aros arr- arra arro arrr arrs ars- arsa arsd arso asaa asab asad asaf asao asar asas asba asbo asda asdf asdo asds asfa asob asod asof asor asos asra asro asrs assa assd asso assr asss baaa baad baaf baar baas baba babb babo babr babs bada badb badd bado badr bads baff bafo baos bar- bara barb bard barf baro barr bars basa basf baso bass bbad bbas bbbb bbbs bbdd bbdo bd-r bdos bdsd bfas bffs bfsr boab boad boar boas boba bobb bobo bobs boda bodb bodo bods bofa bofd boff bofs boob bood boof boor boos bor- bora bord borf boro borr bors bosa boso boss brab brad braf brao bras brda brdo brds broa brob brod broo bror bros brrr brrs brsb brsr bsaa bsas bsbd bsfa bsff bsfs bsod bsos bsra bsrd bssd d-bo daab daad daar daas daba dabb dabo dabs dada dado dads dafa daff dafo dafs daos dara darb dard darf daro darr dars dasa dasb dasd dass dbar dbas dbfo dbfs dbos dbrs dbsa dbss dddd ddss dfaf dfas dfds dffa dfrf doab doar doas doba dobb dobs dod- doda dodd dodo dods doff doob dood doof door doos dora dord dorf doro dorr dors dosa doso doss draa drab drad draf drar dras drba drda drob drod drof drra drrs drsa dsba dsda dsdr dsfa dsoa dsos dsrr dssa faaa faad faas faba fabd fabo fabs fada fadd fado fads fafa faff fafo fara farb fard faro farr fars fasa fasd faso fass fbar fbrs fbsd fdoa fdos ffar ffff ffrr ffsa ffss foad foaf foar foba fobs foda fofo food foof foos for- fora forb ford foro forr fors fosa fosb foso foss frab frad fras frob fros frsb frso fsas fsfo fsra fssa fssf oafo oafs oara oars oass obad obas obba obbo obor obos obra obro obsd obsr obss odas odbo odda oddd odds odoo odor odos odra odso ofas ofdr off- offa offo offr offs ofor ofra ooaa ooba ooda ooff oofs oooo ooos oora oord oosa orab orad orao orar oras orba orbb orbo orbs orda ordo ords orff orfs oro- orof oror oros orra orro orrs orsa orso osaf osar osas osba osfa osoo osor osos osrd osro ossa ossb ossd osso raab raad raaf raas raba rabb rabo rabs rada radd rado radr rads rafa raff raob raos rara rarb rarf raro rars rasa rasd raso rass rbaf rbbb rbbr rbbs rbds rbsd rbss rdas rdfa rdos rdso rfds roab road roaf roar roas rob- roba robb robo robs roda rodd rodo rods roff rofo roob rood roof roor roos rora roro rosa roso ross rrad rras rrrr rsaa rsaf rsdd rsds rsos rssa s-os saab saad saaf saar saas saba sabb sabo sabr sabs sada sadb sadd sado sadr sads safa safb saff safo safr saor saos sara sard sarf saro sarr sars sasa sasd sasf saso sass sbaa sbar sbas sbbs sbds sbor sbsa sbsd sdba sdds sdrs sdsf sdss sfar sfas sfba sfor sfos sfra sfro sfss soad soar soas soba sobo sobr sobs soda sodd sodo sods sofa