a-a a-b a-t aaa aab aao aar aas aat aau aax ab- aba abb abo abr abs abt abu abx aoa aob aoo aor aos aot aou aox ar- ara arb aro arr ars art aru arx as- asa asb aso asr ass ast asu asx at- ata atb ato atr ats att atu atx au- aua aub auo aur aus aut aux ax- axa axo axr axs axt axx b-u baa bab bao bar bas bat bau bax bba bbb bbo bbr bbs bbt bbu bbx boa bob boo bor bos bot bou box bra brb bro brr brs brt bru brx bsa bsb bso bsr bss bst bsu bsx bta btb bto btr bts btt btu btx bua bub buo bur bus but buu bux bxb bxo bxx oaa oab oao oar oas oat oau oax ob- oba obb obo obr obs obt obu obx oo- ooa oob ooo oor oos oot oox or- ora orb oro orr ors ort oru orx os- osa osb oso osr oss ost osu osx ot- ota otb oto otr ots ott otu ou- oua ouo our ous out ox- oxa oxb oxo oxt oxx ra- raa rab rao rar ras rat rau rax rba rbb rbo rbr rbs rbt rbu rbx roa rob roo ror ros rot rou rox rra rrb rrr rrs rrt rru rsa rsb rso rsr rss rst rsu rsx rta rtb rto rtr rts rtt rtu rtx rua rub ruo rur rus rut ruu rux rxr rxs saa sab sao sar sas sat sau sax sba sbb sbo sbr sbs sbt sbu sbx soa sob soo sor sos sot sou sox sr- sra srb sro srr srs srt srx ss- ssa ssb sso ssr sss sst ssu ssx sta stb sto str sts stt stu stx sua sub suo sur sus sut suu sux sxs sxt sxu t-x taa tab tao tar tas tat tau tax tba tbb tbo tbr tbs tbt tbu to- toa tob too tor tos tot tou tox tra trb tro trr trs trt tru trx tsa tsb tso tsr tss tst tsu tsx tta ttb tto ttr tts ttt ttu ttx tua tub tuo tur tus tut tuu tux txs txt txu ua- uaa uab uao uar uas uat uau uba ubb ubo ubr ubs ubt ubu ubx uoa uob uoo uor uos uot uox ur- ura urb uro urr urs urt uru urx usa usb uso usr uss ust usu usx uta utb uto utr uts utt utu utx uua uur uus uut uuu uxb uxo uxr uxt uxu xaa xar xas xat xau xbr xbx xoa xoo xor xos xot xox xrt xrx xsa xsb xss xst xtr xts xtx xus xxo xxx

-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 abax abb- abba abbb abbo abbr abbs abbt aboa abob aboo abor abos abot abou abox 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 arax arba arbs aroa arob aroo aror aros arr- arra arro arrr arrs arrt arru ars- arsa arso arst arsu arta arto artr arts artx 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 at-x ataa atab atar atas atat atax atbs atob ator atos atot atra atro atru atrx atsb atst atta atto attr atts attu atua atub atur atus auaa aur- aura auro ausa aust ausu aut- auto auts auxa axar axat axo- axoa axos axto axxo ba-x baaa baar baas baat baba babb babo babr babs babu baos bar- bara barb baro barr bars bart baru barx basa baso bass bast basu bata bato bats batt batu bau- baur baux baxt bbas bbau bbbb bbbs bbox boab boar boas boat boba bobb bobo bobs bobu boob boor boos boot boox bor- bora boro borr bors bort boru bosa boso boss bost bosu bota botb boto bots bott boua bour bous bout boxa brab brao bras brat brau brax broa brob broo bror bros brot brou brox brrr brrs brsb brsr brst brus brut brux 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 busx but- buta buto buts butt buus buxa oaau oara oars oass oast oats obas obba obbo obor obos obot obox 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- oxa- oxo- oxos oxox oxus oxxo 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 raxa rbbb rbbr rbbs rbss rbst roab roar roas roat rob- roba robb robo robs robt robu roob roor roos root roox rora roro rort roru rosa roso ross rost rota roto rotr rots rott roua roub rous rout roux roxa roxo 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 sa-x saab saar saas saat saba sabb sabo sabr sabs sabu saor saos saou sara saro sarr sars sart saru