-er a-a a-b a-c a-t aaa aab aac aae aag aak aan aao aar aat aau ab- aba abb abc abe abg abk abn abo abr abt abu ac- aca acb acc ace acg ack acn aco acr act acu aea aeb aec aee aeg aek aen aeo aer aet aeu ag- aga agb agc age agg agk agn ago agr agt agu aka akb akc ake akg akk akn ako akr aku an- ana anb anc ane ang ank ann ano anr ant anu aoa aob aoc aoe aog aok aon aoo aor aot aou ar- ara arb arc are arg ark arn aro arr art aru at- ata atb atc ate atg atn ato atr att atu au- aua aub auc aue aug auk aun auo aur aut b-u baa bab bac bae bag bak ban bao bar bat bau bba bbb bbc bbe bbg bbk bbn bbo bbr bbt bbu bca bcb bcc bce bcg bck bcn bco bcr bct bcu be- bea beb bec bee beg bek ben beo ber bet beu bga bgb bgc bge bgg bgk bgn bgo bgr bgt bgu bka bkb bkc bke bkg bkk bkn bko bkr bkt bna bnb bnc bne bng bnk bnn bno bnr bnt bnu boa bob boc boe bog bok bon boo bor bot bou bra brb bre brg brk brn bro brr brt bru bta btb btc bte btg btk btn bto btr btt btu bua bub buc bue bug buk bun buo bur but buu c-- caa cab cac cae cag cak can cao car cat cau cba cbb cbc cbe cbg cbk cbn cbo cbr cbt cbu cca ccb ccc cce ccg cck ccn cco ccr cct ccu ce- cea ceb cec cee ceg cek cen ceo cer cet ceu cga cgb cgc cge cgg cgn cgo cgr cgt cgu cka ckb ckc cko ckt cn- cna cnb cnc cne cng cnn cno cnr cnt cnu co- coa cob coc coe cog cok con coo cor cot cou cra crb crc cre crg crk crn cro crr crt cru cta ctb ctc cte ctg ctk ctn cto ctr ctt ctu cua cub cuc cue cug cuk cun cuo cur cut cuu eaa eab eac eae eag eak ean eao ear eat eau eba ebb ebc ebe ebg ebk ebn ebo ebr ebt ebu ec- eca ecb ecc ece ecg eck ecn eco ecr ect ecu eea eeb eec eee eeg eek een eeo eer eet ega egb egc ege egg egn ego egr egt egu eka ekb ekc eke ekg eko ekr ekt eku en- ena enb enc ene eng enk enn eno enr ent enu eo- eoa eob eoc eoe eog eok eon eoo eor eot eou era erb erc ere erg erk ern ero err ert eru eta etb etc ete etg etk etn eto etr ett etu eu- eua eub euc eue eug eun eur eut gaa gab gac gae gag gak gan gao gar gat gau gba gbc gbe gbg gbk gbn gbo gbr gbt gbu gca gcb gcc gce gcg gck gcn gco gcr gct gcu ge- gea geb gec gee geg gek gen geo ger get geu gga ggb ggc ggg ggn ggo ggr ggt ggu gka gkb gkn gko gkt gna gnb gnc gne gnn gno gnr gnt gnu goa gob goc goe gog gok gon goo gor got gou gra grb grc gre grg grk grn gro grr grt gru gta gtb gtc gte gtg gtk gtn gto gtr gtt gtu gu- gua gub guc gue gug guk gun guo gur gut guu k-t ka- kaa kab kac kae kag kak kan kao kar kat kau kba kbb kbc kbe kbk kbn kbo kbr kbu kca kcb kcc kce kcg kck kcn kcr kct kcu ke- kea keb kec kee keg kek ken keo ker ket kga kgb kgc kgo kgu kkb kkc kke kkk kkn kkr kkt kku kn- kna knc kne kng knk knn kno knr knt knu koa kob koc koe kog kok kon koo kor kot kou kra krc krg krk krn kro krr krt kru kta ktb ktc kte ktg ktk ktn kto ktr ktt ktu kub kuc kue kug kuk kun kur kut kuu naa nab nac nae nag nak nan nao nar nat nau nba nbb nbc nbe nbg nbk nbn nbo nbr nbt nbu nca ncb ncc nce ncg nck ncn nco ncr nct ncu ne- nea neb nec nee neg nek nen neo ner net neu nga ngb ngc nge ngg ngk ngn ngo ngt ngu nka nkc nke nkk nkn nko nkr nkt nku nna nnb nnc nne nng nnk nnn nno nnt nnu no- noa nob noc noe nog nok non noo nor not nou nra nrb nrc nre nrg nrk nrn nro nrr nrt nru nta ntb ntc nte ntg ntk ntn nto ntr ntt ntu nua nub nuc nue nug nuk nun nuo nur nut nuu oaa oab oac oae oag oak oan oao oar oat oau ob- oba obb obc obe obg obk obn obo obr obt obu oc- oca ocb occ ocg ock ocn oco ocr oct ocu oea oeb oec oee oeg oen oeo oer oet oga ogc oge ogg ogn ogo ogt oka okb okc oke okg okk oko okr oku on- ona onb onc one ong onk onn ono onr ont onu oo- ooa oob ooc oog ook oon ooo oor oot or- ora orb orc ore org ork orn oro orr ort oru ot- ota otb otc ote otg otk otn oto otr ott otu ou- oua ouc oue ouk oun ouo our out ra- raa rab rac rae rag rak ran rao rar rat rau rba rbb rbc rbe rbg rbk rbn rbo rbr rbt rbu rca rcb rcc rce rcg rcn rco rcr rct rcu re- rea reb rec ree reg rek ren reo rer ret reu rga rgb rgc rge rgg rgk rgn rgo rgr rgt rkb rkc rke rkg rkk rko rkt