a-a a-b a-c aaa aab aac aaf aah aar aas aau ab- aba abb abc abf abh abr abs abu ac- aca acb acc acf ach acr acs acu af- afa afb afc aff afh afr afs afu aha ahb ahc ahf ahh ahr ahs ahu ar- ara arb arc arf arh arr ars aru as- asa asb asc asf ash asr ass asu au- aua aub auc auf auh aur aus b-u baa bab bac baf bah bar bas bau bba bbb bbc bbf bbh bbr bbs bbu bca bcb bcc bcf bch bcr bcs bcu bfa bfb bfc bff bfh bfr bfs bfu bha bhb bhc bhf bhh bhr bhs bhu bra brb brf brh brr brs bru bsa bsb bsc bsf bsh bsr bss bsu bua bub buc buf buh bur bus buu c-- caa cab cac caf cah car cas cau cba cbb cbc cbf cbh cbr cbs cbu cca ccb ccc ccf cch ccr ccs ccu cfa cfb cfc cff cfh cfr cfs cfu ch- cha chb chc chf chh chr chs chu cra crb crc crf crh crr crs cru csa csb csc csf csh csr css csu cua cub cuc cuf cuh cur cus cuu faa fab fac faf fah far fas fau fba fbb fbc fbf fbh fbr fbs fbu fca fcb fcc fcf fcr fcs fcu ffa ffc fff ffh ffr ffs ffu fha fhb fhc fhf fhh fhr fhs fra frb frc frf frh frr frs fru fsa fsb fsc fsf fsh fsr fss fsu fua fub fuf fur fus fuu haa hab hac haf hah har has hau hba hbb hbc hbf hbh hbr hbs hbu hca hcb hcc hcf hch hcr hcs hfa hfb hfc hff hfh hfr hfs hfu hha hhb hhc hhf hhh hhr hhs hhu hr- hra hrb hrc hrf hrh hrr hrs hru hsa hsb hsc hsf hsh hsr hss hsu hua hub huc huf huh hur hus huu ra- raa rab rac raf rah rar ras rau rba rbb rbc rbf rbh rbr rbs rbu rca rcb rcc rcf rch rcr rcs rcu rfa rfb rfc rff rfh rfr rfs rfu rh- rha rhb rhc rhf rhh rhr rhs rhu rra rrb rrc rrf rrh rrr rrs rru rsa rsb rsc rsf rsh rsr rss rsu rua rub ruc ruf ruh rur rus ruu saa sab sac saf sah sar sas sau sba sbb sbc sbf sbh sbr sbs sbu sca scb scc scf sch scr scs scu sfa sfb sfc sff sfh sfr sfs sfu sh- sha shb shc shf shh shr shs shu sr- sra srb src srf srh srr srs ss- ssa ssb ssc ssf ssh ssr sss ssu sua sub suc suf suh sur sus suu ua- uaa uab uac uaf uah uar uas uau uba ubb ubc ubf ubh ubr ubs ubu uca ucb ucc ucf uch ucr ucs ucu ufa ufc uff ufh ufr ufs ufu uha uhb uhc uhf uhh uhr uhs uhu ur- ura urb urc urf urr urs uru usa usb usc usf ush usr uss usu uua uuc uur uus uuu

a-fu a-ha aaaa aaab aaac aaaf aaah aaar aaas aaba aabb aabc aabh aaca aacb aacc aacf aach aacr aacs aacu aafa aafb aafc aaff aaha aahs aara aarc aars aaru aasa aasc aasf aass aasu aaus abaa abab abac abaf abar abas abau abb- abba abbb abbr abbs abca abcb abcc abcf abch abcr abcs abff abha abhr abhs abra abrc abrs abs- absa absf abss absu abua abuf abus acaa acab acac acar acas acba acca accc accf acch accs accu acfc acfs acha achh achr achs achu acr- acra acrc acrr acrs acsa acsc acss acu- acuf acur acus afaa afar afbs afca afcb afcc afch afcs afcu affa affc affs afhs afr- afra afrc afrs afru afsa afsb afsc afua afus ahab ahac ahah ahar ahas ahau ahfa ahha ahhs ahra ahrc ahrr ahrs ahsa ahss ahua ahus arab arac araf arah arar aras arau arba arbh arbs arc- arca arch arcs arfa arfb arfc arff arfs arfu arh- arhs arr- arra arrc arrh arrr arrs arru ars- arsa arsc arsu arua arub asaa asab asac asaf asah asar asas asau asba asbu asc- asca ascb ascc asch ascr asfa asha ashs ashu asra asrc asrs asru assa assc assh assr asss assu asub asur asus auaa auca auch aufc aufs aur- aura ausa aush ausu baaa baaf baah baar baas baba babb babr babs babu bac- baca bacc bach bacs bafc baff baha bahr bahs bahu bar- bara barb barc barf barh barr bars baru basa basc basf bash bass basu bau- bauf baur bbas bbau bbbb bbbs bbch bbfc bbhs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcfc bchs bcra bcrs bcru bcsa bcsc bcss bcuc bfas bfca bfcs bffs bfhs bfsr bhar bhca bhcc bhff bhhs bhra bhsf bhur bhuu brab brac braf brah bras brau brca brcb brfc brfu brhs brrr brrs brsb brsr bruc bruh brus bsaa bsac bsas bscs bsfa bsfc bsff bsfs bshs bsra bssc buar buba bubb bubs bubu buca bucc buch bucs bucu bufc buff bufr buha buhr buhs bur- bura burb burh burr burs buru busa busc bush buss busu buus caaa caab caac caaf caah caas caba cabf cabs cabu cac- caca cacc cach cacr cafa cafb cafc caff cafs cafu caha cahs cara carb carc carf carr cars casa casb casc cash casr cass casu cauc cauf caus cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbcu cbfb cbfc cbha cbhs cbrh cbsa cbsc cbus ccaa ccab ccac ccaf ccar ccas ccba ccbc ccca cccb cccc cccf cccs cccu ccfa ccfc ccff ccha cchr cchs ccra ccrc ccrf ccrs ccsa ccsf ccss ccuc ccus cfaa cfab cfac cfar cfbc cfbr cfbs cfca cfcb cfcf cfcs cffb cffr cfhs cfra cfrb cfsa chaa chab chac chaf chah char chas chau chca chch chcs chfa chfc chfr chfs chha chhs chra chrb chrc chrf chrr chrs