-ic a-a a-b a-c a-i aaa aab aac aaf aai aar aas aau ab- aba abb abc abf abi abr abs abu ac- aca acb acc acf aci acr acs acu af- afa afb afc aff afi afr afs afu ai- aia aib aic aif aii air ais aiu ar- ara arb arc arf ari arr ars aru as- asa asb asc asf asi asr ass asu au- aua aub auc auf aui aur aus b-u baa bab bac baf bai bar bas bau bba bbb bbc bbf bbi bbr bbs bbu bca bcb bcc bcf bci bcr bcs bcu bfa bfb bfc bff bfi bfr bfs bfu bi- bia bib bic bif bii bir bis biu bra brb brf bri brr brs bru bsa bsb bsc bsf bsi bsr bss bsu bua bub buc buf bui bur bus buu c-- caa cab cac caf cai car cas cau cba cbb cbc cbf cbi cbr cbs cbu cca ccb ccc ccf cci ccr ccs ccu cfa cfb cfc cff cfi cfr cfs cfu ci- cia cib cic cif cii cir cis ciu cra crb crc crf cri crr crs cru csa csb csc csf csi csr css csu cua cub cuc cuf cui cur cus cuu faa fab fac faf fai far fas fau fba fbb fbc fbf fbi fbr fbs fbu fca fcb fcc fcf fci fcr fcs fcu ffa ffc fff ffi ffr ffs ffu fia fib fic fif fii fir fis fiu fra frb frc frf fri frr frs fru fsa fsb fsc fsf fsi fsr fss fsu fua fub fuf fui fur fus fuu i-f ia- iaa iab iac iaf iai iar ias iau iba ibb ibc ibf ibi ibr ibs ibu ica icb icc icf ici icr ics icu ifa ifb ifc iff ifi ifr ifs ifu iia iib iic iif iii iir iis iiu ir- ira irb irc irf iri irr irs iru is- isa isb isc isf isi isr iss isu iu- iua iub iuc iui iur ius ra- raa rab rac raf rai rar ras rau rba rbb rbc rbf rbi rbr rbs rbu rca rcb rcc rcf rci rcr rcs rcu rfa rfb rfc rff rfi rfr rfs rfu ria rib ric rif rii rir ris rra rrb rrc rrf rri rrr rrs rru rsa rsb rsc rsf rsi rsr rss rsu rua rub ruc ruf rui rur rus ruu saa sab sac saf sai sar sas sau sba sbb sbc sbf sbi sbr sbs sbu sca scb scc scf sci scr scs scu sfa sfb sfc sff sfi sfr sfs sfu sia sib sic sif sii sir sis siu sr- sra srb src srf sri srr srs ss- ssa ssb ssc ssf ssi ssr sss ssu sua sub suc suf sui sur sus suu ua- uaa uab uac uaf uai uar uas uau uba ubb ubc ubf ubi ubr ubs ubu uca ucb ucc ucf uci ucr ucs ucu ufa ufc uff ufi ufr ufs ufu uia uib uic uif uii uir uis uiu ur- ura urb urc urf uri urr urs uru usa usb usc usf usi usr uss usu uua uuc uur uus uuu

a-fu a-ii aaaa aaab aaac aaaf aaai aaar aaas aaba aabb aabc aabi aaca aacb aacc aacf aaci aacr aacs aacu aafa aafb aafc aaff aafi aaib aaic aaii aais aara aarc aari aars aaru aasa aasc aasf aasi aass aasu aaus abaa abab abac abaf abai abar abas abau abb- abba abbb abbi abbr abbs abca abcb abcc abcf abci abcr abcs abff abia abib abic abir abis abiu abra abrc abri abrs abs- absa absf absi abss absu abua abuf abus acaa acab acac acai acar acas acba acca accc accf acci accs accu acfc acfi acfs aci- acia acic acif acir acis acr- acra acrc acri acrr acrs acsa acsc acsi acss acu- acuf acur acus afaa afar afbs afca afcb afcc afci afcs afcu affa affc affi affs afia afib afif afir afis afr- afra afrc afri afrs afru afsa afsb afsc afua afus aiai aias aiba aica aicc aicf aicr aics aiff aifs aiia aiib aiic aiir aira airi airs aisa aisb aisi aisr aiui arab arac araf arai arar aras arau arba arbi arbs arc- arca arci arcs arfa arfb arfc arff arfs arfu aria arib arif arii aris arr- arra arrc arri arrr arrs arru ars- arsa arsc arsi arsu arua arub arui asaa asab asac asaf asai asar asas asau asba asbu asc- asca ascb ascc asci ascr asfa asfi asia asic asif asii asir asis asra asrc asrs asru assa assc assi assr asss assu asub asui asur asus auaa auca auci aufc aufi aufs auis aur- aura auri ausa ausu ba-i baaa baaf baar baas baba babb babi babr babs babu bac- baca bacc baci bacs bafc baff baia baib baic bair bais bar- bara barb barc barf bari barr bars baru basa basc basf basi bass basu bau- bauf baur bbas bbau bbbb bbbs bbci bbfc bbrc bcaa bcar bcas bcbc bcbs bcca bccc bcci bccs bcfc bcia bcis bcra bcrs bcru bcsa bcsc bcss bcuc bfas bfca bfcs bffs bfsi bfsr biaf biar bias biba bibb bibi bibs bica bicc bici bics bifa biff bifi biis bira birb biri birr birs biru bis- bisa bisc biss bisu brab brac braf brai bras brau brca brcb brfc brfu bria bric bris brrr brrs brsb brsr bruc brus bsaa bsac bsas bsci bscs bsfa bsfc bsff bsfs bsic bsra bssc buar buba bubb bubi bubs bubu buca bucc buci bucs bucu bufc buff bufr buic buif buir buis buiu bur- bura burb buri burr burs buru busa busc busi buss busu buus caaa caab caac caaf caas caba cabf cabi cabs cabu cac- caca cacc caci cacr cafa cafb cafc caff cafs cafu caia caib caic cair cais caiu cara carb carc carf cari carr cars casa casb casc casi casr cass casu cauc cauf caus cbac cbar cbbc cbbs cbca cbcc cbcr cbcs