-er a-a a-b a-i a-t aaa aab aae aaf aag aai aak aar aas aat aau ab- aba abb abe abf abg abi abk abr abs abt abu aea aeb aee aef aeg aei aek aer aes aet aeu af- afa afb afe aff afg afi afk afr afs aft afu ag- aga agb age agf agg agi agk agr ags agt agu ai- aia aib aie aif aig aii aik air ais ait aiu aka akb ake akg aki akk akr aks aku ar- ara arb are arf arg ari ark arr ars art aru as- asa asb ase asf asg asi ask asr ass ast asu at- ata atb ate atf atg ati atr ats att atu au- aua aub aue auf aug aui auk aur aus aut b-u baa bab bae baf bag bai bak bar bas bat bau bba bbb bbe bbf bbg bbi bbk bbr bbs bbt bbu be- bea beb bee bef beg bei bek ber bes bet beu bfa bfb bfe bff bfg bfi bfr bfs bft bfu bga bgb bge bgf bgg bgi bgk bgr bgs bgt bgu bi- bia bib bie bif big bii bik bir bis bit biu bka bkb bke bkf bkg bkk bkr bks bkt bra brb bre brf brg bri brk brr brs brt bru bsa bsb bse bsf bsg bsi bsk bsr bss bst bsu bta btb bte btf btg bti btk btr bts btt btu bua bub bue buf bug bui buk bur bus but buu eaa eab eae eaf eag eai eak ear eas eat eau eba ebb ebe ebf ebg ebi ebk ebr ebs ebt ebu eea eeb eee eef eeg eek eer ees eet ef- efa efb efe eff efg efi efr efs eft ega egb ege egf egg egi egr egs egt egu eia eib eie eif eig eii eik eir eis eit eiu eka ekb eke ekf ekg eki ekr eks ekt eku era erb ere erf erg eri erk err ers ert eru es- esa esb ese esf esg esi esk esr ess est esu eta etb ete etf etg eti etk etr ets ett etu eu- eua eub eue euf eug eui eur eus eut faa fab fae faf fag fai fak far fas fat fau fba fbb fbe fbf fbg fbi fbk fbr fbs fbt fbu fea feb fee fef feg fei fek fer fes fet feu ffa ffe fff ffg ffi ffk ffr ffs fft ffu fga fgb fge fgf fgg fgi fgr fgs fgt fia fib fie fif fig fii fik fir fis fit fiu fka fkb fkf fkg fki fkk fkt fra frb fre frf frg fri frk frr frs frt fru fsa fsb fse fsf fsg fsi fsk fsr fss fst fsu fta ftb fte ftf ftg fti ftk ftr fts ftt ftu fua fub fue fuf fug fui fuk fur fus fut fuu gaa gab gae gaf gag gai gak gar gas gat gau gba gbe gbf gbg gbi gbk gbr gbs gbt gbu ge- gea geb gee gef geg gei gek ger ges get geu gfa gfb gfe gff gfi gfk gfr gfs gft gga ggb ggg ggi ggr ggs ggt ggu gia gib gie gif gig gii gik gir gis git giu gka gkb gks gkt gra grb gre grf grg gri grk grr grs grt gru gsa gsb gse gsf gsg gsi gsk gsr gss gst gsu gta gtb gte gtf gtg gti gtk gtr gts gtt gtu gu- gua gub gue guf gug gui guk gur gus gut guu i-f ia- iaa iab iae iaf iag iai iar ias iat iau iba ibb ibe ibf ibg ibi ibk ibr ibs ibt ibu ie- iea iee ief ieg iei iek ier ies iet ifa ifb ife iff ifg ifi ifr ifs ift ifu iga igb ige igf igg igi igk igr igs igt igu iia iib iie iif iii iir iis iit iiu ika ikb ike ikf iki ikk ikr iks ikt iku ir- ira irb ire irf irg iri irk irr irs irt iru is- isa isb ise isf isg isi isk isr iss ist isu ita itb ite itf itg iti itk its itt itu iu- iua iub iue iug iui iur ius iut k-t ka- kaa kab kae kaf kag kai kak kar kas kat kau kba kbb kbe kbf kbi kbk kbr kbs kbu ke- kea keb kee kef keg kei kek ker kes ket kfa kff kfg kfi kfs kfu kga kgb kgf kgi kgs kgu kia kib kie kif kig kii kik kir kis kit kiu kkb kke kki kkk kkr kks kkt kku kra krf krg kri krk krr krs krt kru ksa ksb kse ksf ksg ksi ksk ksr kss kst ksu kta ktb kte ktf ktg ktk ktr kts ktt ktu kub kue kug kui kuk kur kus kut kuu ra- raa rab rae raf rag rai rak rar ras rat rau rba rbb rbe rbf rbg rbi rbk rbr rbs rbt rbu re- rea reb ree ref reg rei rek rer res ret reu rfa rfb rfe rff rfg rfi rfk rfr rfs rft rfu rga rgb rge rgf rgg rgi rgk rgr rgs rgt ria rib rie rif rig rii rik rir ris rit rkb rke rkf rkg rkk rks rkt rku rra rrb rrf rrg rri rrk rrr rrs rrt rru rsa rsb rse rsf rsg rsi rsk rsr rss rst rsu rta rtb rte rtf rtg rti rtk rtr rts rtt rtu rua rub rue ruf rug rui ruk rur rus rut ruu saa sab sae saf sag sai sak sar sas sat sau sba sbb sbe sbf sbg sbi sbk sbr sbs sbt sbu se- sea seb see sef seg sei sek ser ses set seu sfa sfb sfe sff sfg sfi sfk sfr sfs sft sfu sga sgb sge sgf sgg sgi sgk sgr sgs sgt sgu sia sib sie sif sig sii sik sir sis sit siu sk- ska skb ske skf skg