-er a-a a-b a-c a-t aaa aab aac aae aag aan aao aar aat aau ab- aba abb abc abe abg abn abo abr abt abu ac- aca acb acc ace acg acn aco acr act acu aea aeb aec aee aeg aen aeo aer aet aeu ag- aga agb agc age agg agn ago agr agt agu an- ana anb anc ane ang ann ano anr ant anu aoa aob aoc aoe aog aon aoo aor aot aou ar- ara arb arc are arg arn aro arr art aru at- ata atb atc ate atg atn ato atr att atu au- aua aub auc aue aug aun auo aur aut b-u baa bab bac bae bag ban bao bar bat bau bba bbb bbc bbe bbg bbn bbo bbr bbt bbu bca bcb bcc bce bcg bcn bco bcr bct bcu be- bea beb bec bee beg ben beo ber bet beu bga bgb bgc bge bgg bgn bgo bgr bgt bgu bna bnb bnc bne bng bnn bno bnr bnt bnu boa bob boc boe bog bon boo bor bot bou bra brb bre brg brn bro brr brt bru bta btb btc bte btg btn bto btr btt btu bua bub buc bue bug bun buo bur but buu c-- caa cab cac cae cag can cao car cat cau cba cbb cbc cbe cbg cbn cbo cbr cbt cbu cca ccb ccc cce ccg ccn cco ccr cct ccu ce- cea ceb cec cee ceg cen ceo cer cet ceu cga cgb cgc cge cgg cgn cgo cgr cgt cgu cn- cna cnb cnc cne cng cnn cno cnr cnt cnu co- coa cob coc coe cog con coo cor cot cou cra crb crc cre crg crn cro crr crt cru cta ctb ctc cte ctg ctn cto ctr ctt ctu cua cub cuc cue cug cun cuo cur cut cuu eaa eab eac eae eag ean eao ear eat eau eba ebb ebc ebe ebg ebn ebo ebr ebt ebu ec- eca ecb ecc ece ecg ecn eco ecr ect ecu eea eeb eec eee eeg een eeo eer eet ega egb egc ege egg egn ego egr egt egu en- ena enb enc ene eng enn eno enr ent enu eo- eoa eob eoc eoe eog eon eoo eor eot eou era erb erc ere erg ern ero err ert eru eta etb etc ete etg etn eto etr ett etu eu- eua eub euc eue eug eun eur eut gaa gab gac gae gag gan gao gar gat gau gba gbc gbe gbg gbn gbo gbr gbt gbu gca gcb gcc gce gcg gcn gco gcr gct gcu ge- gea geb gec gee geg gen geo ger get geu gga ggb ggc ggg ggn ggo ggr ggt ggu gna gnb gnc gne gnn gno gnr gnt gnu goa gob goc goe gog gon goo gor got gou gra grb grc gre grg grn gro grr grt gru gta gtb gtc gte gtg gtn gto gtr gtt gtu gu- gua gub guc gue gug gun guo gur gut guu naa nab nac nae nag nan nao nar nat nau nba nbb nbc nbe nbg nbn nbo nbr nbt nbu nca ncb ncc nce ncg ncn nco ncr nct ncu ne- nea neb nec nee neg nen neo ner net neu nga ngb ngc nge ngg ngn ngo ngt ngu nna nnb nnc nne nng nnn nno nnt nnu no- noa nob noc noe nog non noo nor not nou nra nrb nrc nre nrg nrn nro nrr nrt nru nta ntb ntc nte ntg ntn nto ntr ntt ntu nua nub nuc nue nug nun nuo nur nut nuu oaa oab oac oae oag oan oao oar oat oau ob- oba obb obc obe obg obn obo obr obt obu oc- oca ocb occ ocg ocn oco ocr oct ocu oea oeb oec oee oeg oen oeo oer oet oga ogc oge ogg ogn ogo ogt on- ona onb onc one ong onn ono onr ont onu oo- ooa oob ooc oog oon ooo oor oot or- ora orb orc ore org orn oro orr ort oru ot- ota otb otc ote otg otn oto otr ott otu ou- oua ouc oue oun ouo our out ra- raa rab rac rae rag ran rao rar rat rau rba rbb rbc rbe rbg rbn rbo rbr rbt rbu rca rcb rcc rce rcg rcn rco rcr rct rcu re- rea reb rec ree reg ren reo rer ret reu rga rgb rgc rge rgg rgn rgo rgr rgt rna rnb rnc rng rnn rno rnr rnt rnu roa rob roc roe rog ron roo ror rot rou rra rrb rrc rrg rrn rrr rrt rru rta rtb rtc rte rtg rtn rto rtr rtt rtu rua rub ruc rue rug run ruo rur rut ruu taa tab tac tae tag tan tao tar tat tau tba tbb tbc tbe tbg tbn tbo tbr tbt tbu tca tcb tcc tce tcg tcn tco tcr tct tcu te- tea teb tec tee teg ten teo ter tet teu tga tgb tgc tge tgg tgn tgo tgr tgt tgu tna tnb tnc tne tng tnn tno tnr tnt to- toa tob toc toe tog ton too tor tot tou tra trb trc tre trg trn tro trr trt tru tta ttb ttc tte ttg ttn tto ttr ttt ttu tua tub tuc tue tug tun tuo tur tut tuu ua- uaa uab uac uae uag uan uao uar uat uau uba ubb ubc ube ubg ubn ubo ubr ubt ubu uca ucb ucc uce ucg ucn uco ucr uct ucu uea ueb uec uee ueg uen uer uet uga ugb ugc uge ugg ugn ugo ugr ugt ugu un- una unb unc une ung unn uno unr unt unu uoa uob uoc uoe uog uon uoo uor uot ur- ura urb urc ure urg urn uro urr urt uru uta utb utc ute utn uto utr utt