-er a-a a-b a-c a-t aaa aab aac aad aae aag aao aar aat aau ab- aba abb abc abd abe abg abo abr abt abu ac- aca acb acc acd ace acg aco acr act acu ad- ada adb adc add ade adg ado adr adt adu aea aeb aec aed aee aeg aeo aer aet aeu ag- aga agb agc agd age agg ago agr agt agu aoa aob aoc aod aoe aog aoo aor aot aou ar- ara arb arc ard are arg aro arr art aru at- ata atb atc atd ate atg ato atr att atu au- aua aub auc aud aue aug auo aur aut b-u baa bab bac bad bae bag bao bar bat bau bba bbb bbc bbd bbe bbg bbo bbr bbt bbu bca bcb bcc bcd bce bcg bco bcr bct bcu bda bdb bdc bdd bde bdg bdo bdr bdt bdu be- bea beb bec bed bee beg beo ber bet beu bga bgb bgc bgd bge bgg bgo bgr bgt bgu boa bob boc bod boe bog boo bor bot bou bra brb brd bre brg bro brr brt bru bta btb btc btd bte btg bto btr btt btu bua bub buc bud bue bug buo bur but buu c-- caa cab cac cad cae cag cao car cat cau cba cbb cbc cbd cbe cbg cbo cbr cbt cbu cca ccb ccc ccd cce ccg cco ccr cct ccu cda cdb cdc cdd cde cdg cdo cdr cdt cdu ce- cea ceb cec ced cee ceg ceo cer cet ceu cga cgb cgc cgd cge cgg cgo cgr cgt cgu co- coa cob coc cod coe cog coo cor cot cou cra crb crc crd cre crg cro crr crt cru cta ctb ctc ctd cte ctg cto ctr ctt ctu cua cub cuc cud cue cug cuo cur cut cuu daa dab dac dad dae dag dao dar dat dau dba dbb dbc dbd dbe dbg dbo dbr dbt dbu dca dcb dcc dcd dce dcg dco dcr dct dcu dda ddb ddc ddd dde ddg ddo ddr ddt ddu de- dea deb dec ded dee deg deo der det deu dga dgc dgd dge dgg dgr dgt dgu doa dob doc dod doe dog doo dor dot dou dra drb drc drd dre drg dro drr drt dru dta dtb dtc dtd dte dtg dto dtr dtt dtu dua dub duc dud due dug duo dur dut eaa eab eac ead eae eag eao ear eat eau eba ebb ebc ebd ebe ebg ebo ebr ebt ebu ec- eca ecb ecc ecd ece ecg eco ecr ect ecu ed- eda edb edc edd ede edg edo edr edt edu eea eeb eec eed eee eeg eeo eer eet ega egb egc egd ege egg ego egr egt egu eo- eoa eob eoc eod eoe eog eoo eor eot eou era erb erc erd ere erg ero err ert eru eta etb etc etd ete etg eto etr ett etu eu- eua eub euc eud eue eug eur eut g-d gaa gab gac gad gae gag gao gar gat gau gba gbc gbd gbe gbg gbo gbr gbt gbu gca gcb gcc gcd gce gcg gco gcr gct gcu gda gdb gdc gdd gde gdo gdr gdt gdu ge- gea geb gec ged gee geg geo ger get geu gga ggb ggc ggd ggg ggo ggr ggt ggu goa gob goc god goe gog goo gor got gou gra grb grc grd gre grg gro grr grt gru gta gtb gtc gtd gte gtg gto gtr gtt gtu gu- gua gub guc gud gue gug guo gur gut guu oaa oab oac oad oae oag oao oar oat oau ob- oba obb obc obd obe obg obo obr obt obu oc- oca ocb occ ocd ocg oco ocr oct ocu oda odb odc odd ode odg odo odr odt odu oea oeb oec oed oee oeg oeo oer oet oga ogc ogd oge ogg ogo ogt oo- ooa oob ooc ood oog ooo oor oot or- ora orb orc ord ore org oro orr ort oru ot- ota otb otc otd ote otg oto otr ott otu ou- oua ouc oud oue ouo our out ra- raa rab rac rad rae rag rao rar rat rau rba rbb rbc rbd rbe rbg rbo rbr rbt rbu rca rcb rcc rcd rce rcg rco rcr rct rcu rda rdb rdc rdd rde rdg rdo rdr rdt rdu re- rea reb rec red ree reg reo rer ret reu rga rgb rgc rgd rge rgg rgo rgr rgt roa rob roc rod roe rog roo ror rot rou rra rrb rrc rrd rrg rrr rrt rru rta rtb rtc rtd rte rtg rto rtr rtt rtu rua rub ruc rud rue rug ruo rur rut ruu taa tab tac tad tae tag tao tar tat tau tba tbb tbc tbd tbe tbg tbo tbr tbt tbu tca tcb tcc tcd tce tcg tco tcr tct tcu tda tdb tdc tdd tde tdg tdo tdr tdt tdu te- tea teb tec ted tee teg teo ter tet teu tga tgb tgc tge tgg tgo tgr tgt tgu to- toa tob toc tod toe tog too tor tot tou tra trb trc trd tre trg tro trr trt tru tta ttb ttc ttd tte ttg tto ttr ttt ttu tua tub tuc tud tue tug tuo tur tut tuu ua- uaa uab uac uad uae uag uao uar uat uau uba ubb ubc ube ubg ubo ubr ubt ubu uca ucb ucc ucd uce ucg uco ucr uct ucu uda udb udc udd ude udg udo udr udt udu uea ueb uec ued uee ueg uer uet uga ugb ugc uge ugg ugo ugr ugt ugu uoa uob uoc uod uoe uog uoo uor uot ur- ura urb urc urd ure urg uro urr urt uru uta utb utc utd ute uto utr utt utu uua uuc uue uug