a-a a-b a-t aaa aab aao aar aas aat aau ab- aba abb abo abr abs abt abu aoa aob aoo aor aos aot aou ar- ara arb aro arr ars art aru as- asa asb aso asr ass ast asu at- ata atb ato atr ats att atu au- aua aub auo aur aus aut b-u baa bab bao bar bas bat bau bba bbb bbo bbr bbs bbt bbu boa bob boo bor bos bot bou bra brb bro brr brs brt bru bsa bsb bso bsr bss bst bsu bta btb bto btr bts btt btu bua bub buo bur bus but buu oaa oab oao oar oas oat oau ob- oba obb obo obr obs obt obu oo- ooa oob ooo oor oos oot or- ora orb oro orr ors ort oru os- osa osb oso osr oss ost osu ot- ota otb oto otr ots ott otu ou- oua ouo our ous out ra- raa rab rao rar ras rat rau rba rbb rbo rbr rbs rbt rbu roa rob roo ror ros rot rou rra rrb rrr rrs rrt rru rsa rsb rso rsr rss rst rsu rta rtb rto rtr rts rtt rtu rua rub ruo rur rus rut ruu saa sab sao sar sas sat sau sba sbb sbo sbr sbs sbt sbu soa sob soo sor sos sot sou sr- sra srb sro srr srs srt ss- ssa ssb sso ssr sss sst ssu sta stb sto str sts stt stu sua sub suo sur sus sut suu taa tab tao tar tas tat tau tba tbb tbo tbr tbs tbt tbu to- toa tob too tor tos tot tou tra trb tro trr trs trt tru tsa tsb tso tsr tss tst tsu tta ttb tto ttr tts ttt ttu tua tub tuo tur tus tut tuu ua- uaa uab uao uar uas uat uau uba ubb ubo ubr ubs ubt ubu uoa uob uoo uor uos uot ur- ura urb uro urr urs urt uru usa usb uso usr uss ust usu uta utb uto utr uts utt utu uua uur uus uut uuu

-ous aaaa aaab aaar aaas aaba aabb aabt aaoo aara aaro aars aart aaru aasa aass aast aasu aata aatt aaus abaa abab abar abas abat abau abb- abba abbb abbo abbr abbs abbt aboa abob aboo abor abos abot abou abra abro abrs abs- absa abss absu abta abts abtu abua abus abut aoba aora aorb aors aort aoss aous aout arab arar aras arat arau arba arbs aroa arob aroo aror aros arr- arra arro arrr arrs arrt arru ars- arsa arso arst arsu arta arto artr arts arua arub arut asaa asab asao asar asas asat asau asba asbo asbu asob asor asos asot asou asra asro asrs asru assa asso assr asss asst assu asta astb asto astr asts asub asur asus at-t ataa atab atar atas atat atbs atob ator atos atot atra atro atru atsb atst atta atto attr atts attu atua atub atur atus auaa aur- aura auro ausa aust ausu aut- auto auts baaa baar baas baat baba babb babo babr babs babu baos bar- bara barb baro barr bars bart baru basa baso bass bast basu bata bato bats batt batu bau- baur bbas bbau bbbb bbbs boab boar boas boat boba bobb bobo bobs bobu boob boor boos boot bor- bora boro borr bors bort boru bosa boso boss bost bosu bota botb boto bots bott boua bour bous bout brab brao bras brat brau broa brob broo bror bros brot brou brrr brrs brsb brsr brst brus brut bsaa bsas bsat bsos bsra bsts btaa btob btor btrt btss bttb btus buar buat buba bubb bubo bubs bubu bur- bura burb buro burr burs burt buru busa buss bust busu but- buta buto buts butt buus oaau oara oars oass oast oats obas obba obbo obor obos obot obra obro obsr obss obst obts obus ooaa ooba oooo ooos oora oort oosa oost ootb oots oous orab orao orar oras orat orba orbb orbo orbs orbu oro- oror oros orot orra orro orrs orsa orso orsu orta orto orts orub orus osar osas osat osba osoo osor osos osro ossa ossb osso ossu osta ostr osts otar otas otbs oto- otoo otor otos otra otro otrs otsa otso otsu otta otto otts ottu otur otus ouat oubs our- oura ouro ours ourt ousa oust out- outa outb outo outs ouu- raab raas raat raba rabb rabo rabs rabu raob raos rara rarb raro rars rasa raso rass rast rasu rata rato rats ratt ratu raua raub raus raut rbbb rbbr rbbs rbss rbst roab roar roas roat rob- roba robb robo robs robt robu roob roor roos root rora roro rort roru rosa roso ross rost rota roto rotr rots rott roua roub rous rout rras rrat rrrr rsaa rsos rssa rsts rstu rsua rtas rtss rtts ruas ruba rubb rubs rubu rura ruro rurs ruru rusa ruso russ rust rusu ruta ruto ruts rutt rutu s-os saab saar saas saat saba sabb sabo sabr sabs sabu saor saos saou sara saro sarr sars sart saru sasa saso sass sast sata satb sato satr sats satt satu saua saur saus saut sbaa sbar sbas sbbs sbor sbot sbsa sbst sbus soar soas soat soba sobo sobr sobs sobt sobu soor soos soot sora sorb soro sorr sors sort soru sosa soso soss sost sota soto sots sotu sour sous sout sras sros srta srtr srub ssaa ssab ssao ssas ssat ssau ssbr ssot ssra ssrs sssa sssb ssss ssta sstb ssts stab star stas stat stau stbs stoa stob stoo stor stos stot stou stra stro strs stru stss sttr stub stur stus stut suar suas suat sub- suba subb subo subs suor suos sur- sura suro surr surs surt suru sus- susa suso suss sust susu suta suto sutu suus taa- taar taas taat taba tabb tabo tabs tabu taoa taor taos taou