-er a-a a-b a-c a-t aaa aab aac aad aae aag aan aao aar aas aat ab- aba abb abc abd abe abg abn abo abr abs abt ac- aca acb acc acd ace acg acn aco acr acs act ad- ada adb adc add ade adg adn ado adr ads adt aea aeb aec aed aee aeg aen aeo aer aes aet ag- aga agb agc agd age agg agn ago agr ags agt an- ana anb anc and ane ang ann ano anr ans ant aoa aob aoc aod aoe aog aon aoo aor aos aot ar- ara arb arc ard are arg arn aro arr ars art as- asa asb asc asd ase asg asn aso asr ass ast at- ata atb atc atd ate atg atn ato atr ats att baa bab bac bad bae bag ban bao bar bas bat bba bbb bbc bbd bbe bbg bbn bbo bbr bbs bbt bca bcb bcc bcd bce bcg bcn bco bcr bcs bct bda bdb bdc bdd bde bdg bdo bdr bds bdt be- bea beb bec bed bee beg ben beo ber bes bet bga bgb bgc bgd bge bgg bgn bgo bgr bgs bgt bna bnb bnc bnd bne bng bnn bno bnr bns bnt boa bob boc bod boe bog bon boo bor bos bot bra brb brd bre brg brn bro brr brs brt bsa bsb bsc bsd bse bsg bsn bso bsr bss bst bta btb btc btd bte btg btn bto btr bts btt c-- caa cab cac cad cae cag can cao car cas cat cba cbb cbc cbd cbe cbg cbn cbo cbr cbs cbt cca ccb ccc ccd cce ccg ccn cco ccr ccs cct cda cdb cdc cdd cde cdg cdn cdo cdr cds cdt ce- cea ceb cec ced cee ceg cen ceo cer ces cet cga cgb cgc cgd cge cgg cgn cgo cgr cgs cgt cn- cna cnb cnc cnd cne cng cnn cno cnr cns cnt co- coa cob coc cod coe cog con coo cor cos cot cra crb crc crd cre crg crn cro crr crs crt csa csb csc csd cse csg csn cso csr css cst cta ctb ctc ctd cte ctg ctn cto ctr cts ctt daa dab dac dad dae dag dan dao dar das dat dba dbb dbc dbd dbe dbg dbn dbo dbr dbs dbt dca dcb dcc dcd dce dcg dcn dco dcr dcs dct dda ddb ddc ddd dde ddg ddn ddo ddr dds ddt de- dea deb dec ded dee deg den deo der des det dga dgc dgd dge dgg dgn dgr dgs dgt dna dnb dnc dnd dne dng dnn dno dnr dns dnt doa dob doc dod doe dog don doo dor dos dot dra drb drc drd dre drg drn dro drr drs drt dsa dsb dsc dsd dse dsg dsn dso dsr dss dst dta dtb dtc dtd dte dtg dtn dto dtr dts dtt eaa eab eac ead eae eag ean eao ear eas eat eba ebb ebc ebd ebe ebg ebn ebo ebr ebs ebt ec- eca ecb ecc ecd ece ecg ecn eco ecr ecs ect ed- eda edb edc edd ede edg edn edo edr eds edt eea eeb eec eed eee eeg een eeo eer ees eet ega egb egc egd ege egg egn ego egr egs egt en- ena enb enc end ene eng enn eno enr ens ent eo- eoa eob eoc eod eoe eog eon eoo eor eos eot era erb erc erd ere erg ern ero err ers ert es- esa esb esc esd ese esg esn eso esr ess est eta etb etc etd ete etg etn eto etr ets ett g-d gaa gab gac gad gae gag gan gao gar gas gat gba gbc gbd gbe gbg gbn gbo gbr gbs gbt gca gcb gcc gcd gce gcg gcn gco gcr gcs gct gda gdb gdc gdd gde gdn gdo gdr gds gdt ge- gea geb gec ged gee geg gen geo ger ges get gga ggb ggc ggd ggg ggn ggo ggr ggs ggt gna gnb gnc gnd gne gnn gno gnr gns gnt goa gob goc god goe gog gon goo gor gos got gra grb grc grd gre grg grn gro grr grs grt gsa gsb gsc gsd gse gsg gsn gso gsr gss gst gta gtb gtc gtd gte gtg gtn gto gtr gts gtt naa nab nac nad nae nag nan nao nar nas nat nba nbb nbc nbd nbe nbg nbn nbo nbr nbs nbt nca ncb ncc ncd nce ncg ncn nco ncr ncs nct nda ndb ndc ndd nde ndg ndn ndo ndr nds ndt ne- nea neb nec ned nee neg nen neo ner nes net nga ngb ngc ngd nge ngg ngn ngo ngs ngt nna nnb nnc nne nng nnn nno nns nnt no- noa nob noc nod noe nog non noo nor nos not nra nrb nrc nrd nre nrg nrn nro nrr nrs nrt nsa nsb nsc nsd nse nsg nsn nso nsr nss nst nta ntb ntc ntd nte ntg ntn nto ntr nts ntt oaa oab oac oad oae oag oan oao oar oas oat ob- oba obb obc obd obe obg obn obo obr obs obt oc- oca ocb occ ocd ocg ocn oco ocr ocs oct oda odb odc odd ode odg odn odo odr ods odt oea oeb oec oed oee oeg oen oeo oer oes oet oga ogc ogd oge ogg ogn ogo ogs ogt on- ona onb onc ond one ong onn ono onr ons ont oo- ooa oob ooc ood oog oon ooo oor oos oot or- ora orb orc ord ore org orn oro orr ors ort os- osa osb osc osd ose osg osn oso osr oss ost ot- ota otb otc otd ote otg otn oto otr ots ott ra- raa rab rac rad rae rag ran rao rar ras rat