-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aag aai aak aar aas aat aau ab- aba abb abc abe abg abi abk abr abs abt abu ac- aca acb acc ace acg aci ack acr acs act acu aea aeb aec aee aeg aei aek aer aes aet aeu ag- aga agb agc age agg agi agk agr ags agt agu ai- aia aib aic aie aig aii aik air ais ait aiu aka akb akc ake akg aki akk akr aks aku ar- ara arb arc are arg ari ark arr ars art aru as- asa asb asc ase asg asi ask asr ass ast asu at- ata atb atc ate atg ati atr ats att atu au- aua aub auc aue aug aui auk aur aus aut b-u baa bab bac bae bag bai bak bar bas bat bau bba bbb bbc bbe bbg bbi bbk bbr bbs bbt bbu bca bcb bcc bce bcg bci bck bcr bcs bct bcu be- bea beb bec bee beg bei bek ber bes bet beu bga bgb bgc bge bgg bgi bgk bgr bgs bgt bgu bi- bia bib bic bie big bii bik bir bis bit biu bka bkb bkc bke bkg bkk bkr bks bkt bra brb bre brg bri brk brr brs brt bru bsa bsb bsc bse bsg bsi bsk bsr bss bst bsu bta btb btc bte btg bti btk btr bts btt btu bua bub buc bue bug bui buk bur bus but buu c-- caa cab cac cae cag cai cak car cas cat cau cba cbb cbc cbe cbg cbi cbk cbr cbs cbt cbu cca ccb ccc cce ccg cci cck ccr ccs cct ccu ce- cea ceb cec cee ceg cei cek cer ces cet ceu cga cgb cgc cge cgg cgi cgr cgs cgt cgu ci- cia cib cic cie cig cii cik cir cis cit ciu cka ckb ckc cki cks ckt cra crb crc cre crg cri crk crr crs crt cru csa csb csc cse csg csi csk csr css cst csu cta ctb ctc cte ctg cti ctk ctr cts ctt ctu cua cub cuc cue cug cui cuk cur cus cut cuu eaa eab eac eae eag eai eak ear eas eat eau eba ebb ebc ebe ebg ebi ebk ebr ebs ebt ebu ec- eca ecb ecc ece ecg eci eck ecr ecs ect ecu eea eeb eec eee eeg eek eer ees eet ega egb egc ege egg egi egr egs egt egu eia eib eic eie eig eii eik eir eis eit eiu eka ekb ekc eke ekg eki ekr eks ekt eku era erb erc ere erg eri erk err ers ert eru es- esa esb esc ese esg esi esk esr ess est esu eta etb etc ete etg eti etk etr ets ett etu eu- eua eub euc eue eug eui eur eus eut gaa gab gac gae gag gai gak gar gas gat gau gba gbc gbe gbg gbi gbk gbr gbs gbt gbu gca gcb gcc gce gcg gci gck gcr gcs gct gcu ge- gea geb gec gee geg gei gek ger ges get geu gga ggb ggc ggg ggi ggr ggs ggt ggu gia gib gic gie gig gii gik gir gis git giu gka gkb gks gkt gra grb grc gre grg gri grk grr grs grt gru gsa gsb gsc gse gsg gsi gsk gsr gss gst gsu gta gtb gtc gte gtg gti gtk gtr gts gtt gtu gu- gua gub guc gue gug gui guk gur gus gut guu ia- iaa iab iac iae iag iai iar ias iat iau iba ibb ibc ibe ibg ibi ibk ibr ibs ibt ibu ica icb icc ice icg ici ick icr ics ict icu ie- iea iec iee ieg iei iek ier ies iet iga igb igc ige igg igi igk igr igs igt igu iia iib iic iie iii iir iis iit iiu ika ikb ikc ike iki ikk ikr iks ikt iku ir- ira irb irc ire irg iri irk irr irs irt iru is- isa isb isc ise isg isi isk isr iss ist isu ita itb itc ite itg iti itk its itt itu iu- iua iub iuc iue iug iui iur ius iut k-t ka- kaa kab kac kae kag kai kak kar kas kat kau kba kbb kbc kbe kbi kbk kbr kbs kbu kca kcb kcc kce kcg kci kck kcr kcs kct kcu ke- kea keb kec kee keg kei kek ker kes ket kga kgb kgc kgi kgs kgu kia kib kic kie kig kii kik kir kis kit kiu kkb kkc kke kki kkk kkr kks kkt kku kra krc krg kri krk krr krs krt kru ksa ksb ksc kse ksg ksi ksk ksr kss kst ksu kta ktb ktc kte ktg ktk ktr kts ktt ktu kub kuc kue kug kui kuk kur kus kut kuu ra- raa rab rac rae rag rai rak rar ras rat rau rba rbb rbc rbe rbg rbi rbk rbr rbs rbt rbu rca rcb rcc rce rcg rci rcr rcs rct rcu re- rea reb rec ree reg rei rek rer res ret reu rga rgb rgc rge rgg rgi rgk rgr rgs rgt ria rib ric rie rig rii rik rir ris rit rkb rkc rke rkg rkk rks rkt rku rra rrb rrc rrg rri rrk rrr rrs rrt rru rsa rsb rsc rse rsg rsi rsk rsr rss rst rsu rta rtb rtc rte rtg rti rtk rtr rts rtt rtu rua rub ruc rue rug rui ruk rur rus rut ruu saa sab sac sae sag sai sak sar sas sat sau sba sbb sbc sbe sbg sbi sbk sbr sbs sbt sbu sca scb scc sce scg sci sck scr scs sct scu se- sea seb sec see seg sei sek ser ses set seu sga sgb sgc sge sgg sgi sgk sgr sgs