-er a-a a-b a-i a-t aaa aab aad aae aag aai aak aao aar aas aat ab- aba abb abd abe abg abi abk abo abr abs abt ad- ada adb add ade adg adi adk ado adr ads adt aea aeb aed aee aeg aei aek aeo aer aes aet ag- aga agb agd age agg agi agk ago agr ags agt ai- aia aib aid aie aig aii aik aio air ais ait aka akb akd ake akg aki akk ako akr aks aoa aob aod aoe aog aoi aok aoo aor aos aot ar- ara arb ard are arg ari ark aro arr ars art as- asa asb asd ase asg asi ask aso asr ass ast at- ata atb atd ate atg ati ato atr ats att baa bab bad bae bag bai bak bao bar bas bat bba bbb bbd bbe bbg bbi bbk bbo bbr bbs bbt bda bdb bdd bde bdg bdi bdk bdo bdr bds bdt be- bea beb bed bee beg bei bek beo ber bes bet bga bgb bgd bge bgg bgi bgk bgo bgr bgs bgt bi- bia bib bid bie big bii bik bio bir bis bit bka bkb bke bkg bkk bko bkr bks bkt boa bob bod boe bog boi bok boo bor bos bot bra brb brd bre brg bri brk bro brr brs brt bsa bsb bsd bse bsg bsi bsk bso bsr bss bst bta btb btd bte btg bti btk bto btr bts btt daa dab dad dae dag dai dak dao dar das dat dba dbb dbd dbe dbg dbi dbk dbo dbr dbs dbt dda ddb ddd dde ddg ddi ddk ddo ddr dds ddt de- dea deb ded dee deg dei dek deo der des det dga dgd dge dgg dgi dgk dgr dgs dgt di- dia dib did die dig dii dik dio dir dis dit dka dkb dke dkg dki dkk dko dkr dks dkt doa dob dod doe dog doi dok doo dor dos dot dra drb drd dre drg dri drk dro drr drs drt dsa dsb dsd dse dsg dsi dsk dso dsr dss dst dta dtb dtd dte dtg dti dtk dto dtr dts dtt eaa eab ead eae eag eai eak eao ear eas eat eba ebb ebd ebe ebg ebi ebk ebo ebr ebs ebt ed- eda edb edd ede edg edi edk edo edr eds edt eea eeb eed eee eeg eek eeo eer ees eet ega egb egd ege egg egi ego egr egs egt eia eib eid eie eig eii eik eio eir eis eit eka ekb ekd eke ekg eki eko ekr eks ekt eo- eoa eob eod eoe eog eoi eok eoo eor eos eot era erb erd ere erg eri erk ero err ers ert es- esa esb esd ese esg esi esk eso esr ess est eta etb etd ete etg eti etk eto etr ets ett g-d gaa gab gad gae gag gai gak gao gar gas gat gba gbd gbe gbg gbi gbk gbo gbr gbs gbt gda gdb gdd gde gdi gdk gdo gdr gds gdt ge- gea geb ged gee geg gei gek geo ger ges get gga ggb ggd ggg ggi ggo ggr ggs ggt gia gib gid gie gig gii gik gio gir gis git gka gkb gkd gko gks gkt goa gob god goe gog goi gok goo gor gos got gra grb grd gre grg gri grk gro grr grs grt gsa gsb gsd gse gsg gsi gsk gso gsr gss gst gta gtb gtd gte gtg gti gtk gto gtr gts gtt i-d ia- iaa iab iad iae iag iai iao iar ias iat iba ibb ibd ibe ibg ibi ibk ibo ibr ibs ibt ida idb idd ide idg idi idk ido idr ids idt ie- iea ied iee ieg iei iek ier ies iet iga igb igd ige igg igi igk igo igr igs igt iia iib iid iie iii iio iir iis iit ika ikb ike iki ikk iko ikr iks ikt io- ioa iob iod ioe iog ioi ioo ior ios iot ir- ira irb ird ire irg iri irk iro irr irs irt is- isa isb isd ise isg isi isk iso isr iss ist ita itb itd ite itg iti itk ito its itt k-t ka- kaa kab kad kae kag kai kak kao kar kas kat kba kbb kbd kbe kbi kbk kbo kbr kbs kda kdb kde kdg kdk kdo kdr kds kdt ke- kea keb ked kee keg kei kek keo ker kes ket kga kgb kgd kgi kgo kgs kia kib kid kie kig kii kik kio kir kis kit kkb kke kki kkk kkr kks kkt koa kob kod koe kog koi kok koo kor kos kot kra krd krg kri krk kro krr krs krt ksa ksb ksd kse ksg ksi ksk kso ksr kss kst kta ktb kte ktg ktk kto ktr kts ktt o-i oaa oab oad oae oag oai oak oao oar oas oat ob- oba obb obd obe obg obi obk obo obr obs obt oda odb odd ode odg odi odo odr ods odt oea oeb oed oee oeg oei oeo oer oes oet oga ogd oge ogg ogi ogo ogs ogt oia oib oid oie oii oik oio oir ois oit oka okb okd oke okg oki okk oko okr oks oo- ooa oob ood oog ooi ook ooo oor oos oot or- ora orb ord ore org ori ork oro orr ors ort os- osa osb osd ose osg osi osk oso osr oss ost ot- ota otb otd ote otg oti otk oto otr ots ott ra- raa rab rad rae rag rai rak rao rar ras rat rba rbb rbd rbe rbg rbi rbk rbo rbr rbs rbt rda rdb rdd rde rdg rdi rdo rdr rds rdt re- rea reb red ree reg rei rek reo rer res ret rga rgb rgd rge