-er a-a a-c aaa aac aae aag aah aak aan aao aar ac- aca acc ace acg ach ack acn aco acr aea aec aee aeg aeh aek aen aeo aer ag- aga agc age agg agh agk agn ago agr aha ahc ahe ahg ahh ahk ahn aho ahr aka akc ake akg akh akk akn ako akr an- ana anc ane ang anh ank ann ano anr aoa aoc aoe aog aoh aok aon aoo aor ar- ara arc are arg arh ark arn aro arr c-- caa cac cae cag cah cak can cao car cca ccc cce ccg cch cck ccn cco ccr ce- cea cec cee ceg ceh cek cen ceo cer cga cgc cge cgg cgh cgn cgo cgr ch- cha chc che chg chh chk chn cho chr cka ckc ckh cko cn- cna cnc cne cng cnh cnn cno cnr co- coa coc coe cog coh cok con coo cor cra crc cre crg crh crk crn cro crr eaa eac eae eag eah eak ean eao ear ec- eca ecc ece ecg ech eck ecn eco ecr eea eec eee eeg eek een eeo eer ega egc ege egg egh egn ego egr eha ehc ehe ehg ehh ehn eho ehr eka ekc eke ekg ekh eko ekr en- ena enc ene eng enh enk enn eno enr eo- eoa eoc eoe eog eoh eok eon eoo eor era erc ere erg erh erk ern ero err gaa gac gae gag gah gak gan gao gar gca gcc gce gcg gch gck gcn gco gcr ge- gea gec gee geg geh gek gen geo ger gga ggc ggg ggh ggn ggo ggr gha ghc ghe ghg ghh ghn gho ghr gka gkh gkn gko gna gnc gne gnn gno gnr goa goc goe gog goh gok gon goo gor gra grc gre grg grh grk grn gro grr haa hac hae hag hah hak han hao har hca hcc hce hcg hch hck hcn hco hcr he- hea hec hee heg heh hek hen heo her hga hgc hge hgg hgh hgk hgn hgo hgr hha hhc hhe hhg hhh hhk hhn hho hhr hka hkg hkh hkk hkn hko hkr hna hnc hne hng hnh hnk hnn hno hoa hoc hoe hog hoh hok hon hoo hor hr- hra hrc hre hrg hrh hrk hrn hro hrr ka- kaa kac kae kag kah kak kan kao kar kca kcc kce kcg kch kck kcn kcr ke- kea kec kee keg keh kek ken keo ker kga kgc kgh kgo kha khe khh khk khn kho khr kkc kke kkh kkk kkn kkr kn- kna knc kne kng knk knn kno knr koa koc koe kog koh kok kon koo kor kra krc krg krk krn kro krr naa nac nae nag nah nak nan nao nar nca ncc nce ncg nch nck ncn nco ncr ne- nea nec nee neg neh nek nen neo ner nga ngc nge ngg ngh ngk ngn ngo nha nhc nhe nhg nhh nhk nhn nhr nka nkc nke nkk nkn nko nkr nna nnc nne nng nnh nnk nnn nno no- noa noc noe nog noh nok non noo nor nra nrc nre nrg nrk nrn nro nrr oaa oac oae oag oah oak oan oao oar oc- oca occ ocg och ock ocn oco ocr oea oec oee oeg oeh oen oeo oer oga ogc oge ogg ogh ogn ogo oha ohc ohe ohg ohh ohn oho ohr oka okc oke okg okk oko okr on- ona onc one ong onh onk onn ono onr oo- ooa ooc oog ooh ook oon ooo oor or- ora orc ore org orh ork orn oro orr ra- raa rac rae rag rah rak ran rao rar rca rcc rce rcg rch rcn rco rcr re- rea rec ree reg reh rek ren reo rer rga rgc rge rgg rgh rgk rgn rgo rgr rh- rha rhc rhe rhg rhh rhn rho rhr rkc rke rkg rkk rko rna rnc rng rnh rnn rno rnr roa roc roe rog roh rok ron roo ror rra rrc rrg rrh rrk rrn rrr