-er a-a a-b a-c a-t aaa aab aac aae aaf aag aar aat aau ab- aba abb abc abe abf abg abr abt abu ac- aca acb acc ace acf acg acr act acu aea aeb aec aee aef aeg aer aet aeu af- afa afb afc afe aff afg afr aft afu ag- aga agb agc age agf agg agr agt agu ar- ara arb arc are arf arg arr art aru at- ata atb atc ate atf atg atr att atu au- aua aub auc aue auf aug aur aut b-u baa bab bac bae baf bag bar bat bau bba bbb bbc bbe bbf bbg bbr bbt bbu bca bcb bcc bce bcf bcg bcr bct bcu be- bea beb bec bee bef beg ber bet beu bfa bfb bfc bfe bff bfg bfr bft bfu bga bgb bgc bge bgf bgg bgr bgt bgu bra brb bre brf brg brr brt bru bta btb btc bte btf btg btr btt btu bua bub buc bue buf bug bur but buu c-- caa cab cac cae caf cag car cat cau cba cbb cbc cbe cbf cbg cbr cbt cbu cca ccb ccc cce ccf ccg ccr cct ccu ce- cea ceb cec cee cef ceg cer cet ceu cfa cfb cfc cfe cff cfg cfr cft cfu cga cgb cgc cge cgg cgr cgt cgu cra crb crc cre crf crg crr crt cru cta ctb ctc cte ctf ctg ctr ctt ctu cua cub cuc cue cuf cug cur cut cuu eaa eab eac eae eaf eag ear eat eau eba ebb ebc ebe ebf ebg ebr ebt ebu ec- eca ecb ecc ece ecf ecg ecr ect ecu eea eeb eec eee eef eeg eer eet ef- efa efb efc efe eff efg efr eft ega egb egc ege egf egg egr egt egu era erb erc ere erf erg err ert eru eta etb etc ete etf etg etr ett etu eu- eua eub euc eue euf eug eur eut faa fab fac fae faf fag far fat fau fba fbb fbc fbe fbf fbg fbr fbt fbu fca fcb fcc fce fcf fcg fcr fct fcu fea feb fec fee fef feg fer fet feu ffa ffc ffe fff ffg ffr fft ffu fga fgb fgc fge fgf fgg fgr fgt fra frb frc fre frf frg frr frt fru fta ftb ftc fte ftf ftg ftr ftt ftu fua fub fue fuf fug fur fut fuu gaa gab gac gae gaf gag gar gat gau gba gbc gbe gbf gbg gbr gbt gbu gca gcb gcc gce gcf gcg gcr gct gcu ge- gea geb gec gee gef geg ger get geu gfa gfb gfc gfe gff gfr gft gga ggb ggc ggg ggr ggt ggu gra grb grc gre grf grg grr grt gru gta gtb gtc gte gtf gtg gtr gtt gtu gu- gua gub guc gue guf gug gur gut guu ra- raa rab rac rae raf rag rar rat rau rba rbb rbc rbe rbf rbg rbr rbt rbu rca rcb rcc rce rcf rcg rcr rct rcu re- rea reb rec ree ref reg rer ret reu rfa rfb rfc rfe rff rfg rfr rft rfu rga rgb rgc rge rgf rgg rgr rgt rra rrb rrc rrf rrg rrr rrt rru rta rtb rtc rte rtf rtg rtr rtt rtu rua rub ruc rue ruf rug rur rut ruu taa tab tac tae taf tag tar tat tau tba tbb tbc tbe tbf tbg tbr tbt tbu tca tcb tcc tce tcf tcg tcr tct tcu te- tea teb tec tee tef teg ter tet teu tfa tfb tfc tfe tff tfg tfr tft tfu tga tgb tgc tge tgf tgg tgr tgt tgu tra trb trc tre trf trg trr trt tru tta ttb ttc tte ttf ttg ttr ttt ttu tua tub tuc tue tuf tug tur tut tuu ua- uaa uab uac uae uaf uag uar uat uau uba ubb ubc ube ubf ubg ubr ubt ubu uca ucb ucc uce ucf ucg ucr uct ucu uea ueb uec uee uef ueg uer uet ufa ufc ufe uff ufg ufr uft ufu uga ugb ugc uge ugf ugg ugr ugt ugu ur- ura urb urc ure urf urg urr urt uru uta utb utc ute utf utr utt utu uua uuc uue uug uur uut uuu

a-be a-fu aaaa aaab aaac aaae aaaf aaar aaba aabb aabc aabt aaca aacb aacc aace aacf aacr aact aacu aaea aaec aafa aafb aafc aaff aage aara aarc aare aart aaru aata aatc aatf aatt abaa abab abac abae abaf abag abar abat abau abb- abba abbb abbe abbr abbt abca abcb abcc abcf abcr abct abec abee aber abet abff abra abrc abta abtu abua abue abuf abug abut ac-t acaa acab acac acae acag acar acat acba acca accc acce accf acct accu ace- acea acec acer acet acfc acfe acft acga acgr acr- acra acrc acre acrr acta actc acte actf actg actt actu acu- acue acuf acur acut aeac aeaf aecb aect aeer aega aer- aera aerc aeta aetc aetf aetr aett afaa afar afat afca afcb afcc afcu afee afer afet affa affc afft afgf afr- afra afrc afre afru afta aftc afte afua afue agac agag agar agat agau agba agca agcc agce agct agea agee ager aget agfa agga agge aggu agra agre agta agte agtr agua ague agur agut arab arac arae araf arag arar arat arau arba arbe arc- arca arce arct area arec aree aref areg aret areu arfa arfb arfc arff arft arfu arga argb arge arr- arra arrc arre arrg arrr arrt arru arta artc arte artr arua arub arue arug arut at-t ataa atab atac atae atar atat atca atcc atcf atcr atea atec atee atef ater atfb atfc atfe atra atrc atre atru atta atte attr attu atua atub atuc atug atur auaa aube auca auce auct auer aufc aufe auga