-er a-a a-b a-c a-t aaa aab aac aad aae aag aan aao aar aat ab- aba abb abc abd abe abg abn abo abr abt ac- aca acb acc acd ace acg acn aco acr act ad- ada adb adc add ade adg adn ado adr adt aea aeb aec aed aee aeg aen aeo aer aet ag- aga agb agc agd age agg agn ago agr agt an- ana anb anc and ane ang ann ano anr ant aoa aob aoc aod aoe aog aon aoo aor aot ar- ara arb arc ard are arg arn aro arr art at- ata atb atc atd ate atg atn ato atr att baa bab bac bad bae bag ban bao bar bat bba bbb bbc bbd bbe bbg bbn bbo bbr bbt bca bcb bcc bcd bce bcg bcn bco bcr bct bda bdb bdc bdd bde bdg bdo bdr bdt be- bea beb bec bed bee beg ben beo ber bet bga bgb bgc bgd bge bgg bgn bgo bgr bgt bna bnb bnc bnd bne bng bnn bno bnr bnt boa bob boc bod boe bog bon boo bor bot bra brb brd bre brg brn bro brr brt bta btb btc btd bte btg btn bto btr btt c-- caa cab cac cad cae cag can cao car cat cba cbb cbc cbd cbe cbg cbn cbo cbr cbt cca ccb ccc ccd cce ccg ccn cco ccr cct cda cdb cdc cdd cde cdg cdn cdo cdr cdt ce- cea ceb cec ced cee ceg cen ceo cer cet cga cgb cgc cgd cge cgg cgn cgo cgr cgt cn- cna cnb cnc cnd cne cng cnn cno cnr cnt co- coa cob coc cod coe cog con coo cor cot cra crb crc crd cre crg crn cro crr crt cta ctb ctc ctd cte ctg ctn cto ctr ctt daa dab dac dad dae dag dan dao dar dat dba dbb dbc dbd dbe dbg dbn dbo dbr dbt dca dcb dcc dcd dce dcg dcn dco dcr dct dda ddb ddc ddd dde ddg ddn ddo ddr ddt de- dea deb dec ded dee deg den deo der det dga dgc dgd dge dgg dgn dgr dgt dna dnb dnc dnd dne dng dnn dno dnr dnt doa dob doc dod doe dog don doo dor dot dra drb drc drd dre drg drn dro drr drt dta dtb dtc dtd dte dtg dtn dto dtr dtt eaa eab eac ead eae eag ean eao ear eat eba ebb ebc ebd ebe ebg ebn ebo ebr ebt ec- eca ecb ecc ecd ece ecg ecn eco ecr ect ed- eda edb edc edd ede edg edn edo edr edt eea eeb eec eed eee eeg een eeo eer eet ega egb egc egd ege egg egn ego egr egt en- ena enb enc end ene eng enn eno enr ent eo- eoa eob eoc eod eoe eog eon eoo eor eot era erb erc erd ere erg ern ero err ert eta etb etc etd ete etg etn eto etr ett g-d gaa gab gac gad gae gag gan gao gar gat gba gbc gbd gbe gbg gbn gbo gbr gbt gca gcb gcc gcd gce gcg gcn gco gcr gct gda gdb gdc gdd gde gdn gdo gdr gdt ge- gea geb gec ged gee geg gen geo ger get gga ggb ggc ggd ggg ggn ggo ggr ggt gna gnb gnc gnd gne gnn gno gnr gnt goa gob goc god goe gog gon goo gor got gra grb grc grd gre grg grn gro grr grt gta gtb gtc gtd gte gtg gtn gto gtr gtt naa nab nac nad nae nag nan nao nar nat nba nbb nbc nbd nbe nbg nbn nbo nbr nbt nca ncb ncc ncd nce ncg ncn nco ncr nct nda ndb ndc ndd nde ndg ndn ndo ndr ndt ne- nea neb nec ned nee neg nen neo ner net nga ngb ngc ngd nge ngg ngn ngo ngt nna nnb nnc nne nng nnn nno nnt no- noa nob noc nod noe nog non noo nor not nra nrb nrc nrd nre nrg nrn nro nrr nrt nta ntb ntc ntd nte ntg ntn nto ntr ntt oaa oab oac oad oae oag oan oao oar oat ob- oba obb obc obd obe obg obn obo obr obt oc- oca ocb occ ocd ocg ocn oco ocr oct oda odb odc odd ode odg odn odo odr odt oea oeb oec oed oee oeg oen oeo oer oet oga ogc ogd oge ogg ogn ogo ogt on- ona onb onc ond one ong onn ono onr ont oo- ooa oob ooc ood oog oon ooo oor oot or- ora orb orc ord ore org orn oro orr ort ot- ota otb otc otd ote otg otn oto otr ott ra- raa rab rac rad rae rag ran rao rar rat rba rbb rbc rbd rbe rbg rbn rbo rbr rbt rca rcb rcc rcd rce rcg rcn rco rcr rct rda rdb rdc rdd rde rdg rdn rdo rdr rdt re- rea reb rec red ree reg ren reo rer ret rga rgb rgc rgd rge rgg rgn rgo rgr rgt rna rnb rnc rnd rng rnn rno rnr rnt roa rob roc rod roe rog ron roo ror rot rra rrb rrc rrd rrg rrn rrr rrt rta rtb rtc rtd rte rtg rtn rto rtr rtt taa tab tac tad tae tag tan tao tar tat tba tbb tbc tbd tbe tbg tbn tbo tbr tbt tca tcb tcc tcd tce tcg tcn tco tcr tct tda tdb tdc tdd tde tdg tdn tdo tdr tdt te- tea teb tec ted tee teg ten teo ter tet tga tgb tgc tge tgg tgn tgo tgr tgt tna tnb tnc tnd tne tng tnn tno tnr tnt to- toa tob toc tod toe tog ton too tor tot tra trb trc