-er a-a a-c aaa aac aae aah aak aan aao aar ac- aca acc ace ach ack acn aco acr aea aec aee aeh aek aen aeo aer aha ahc ahe ahh ahk ahn aho ahr aka akc ake akh akk akn ako akr an- ana anc ane anh ank ann ano anr aoa aoc aoe aoh aok aon aoo aor ar- ara arc are arh ark arn aro arr c-- caa cac cae cah cak can cao car cca ccc cce cch cck ccn cco ccr ce- cea cec cee ceh cek cen ceo cer ch- cha chc che chh chk chn cho chr cka ckc ckh cko cn- cna cnc cne cnh cnn cno cnr co- coa coc coe coh cok con coo cor cra crc cre crh crk crn cro crr eaa eac eae eah eak ean eao ear ec- eca ecc ece ech eck ecn eco ecr eea eec eee eek een eeo eer eha ehc ehe ehh ehn eho ehr eka ekc eke ekh eko ekr en- ena enc ene enh enk enn eno enr eo- eoa eoc eoe eoh eok eon eoo eor era erc ere erh erk ern ero err haa hac hae hah hak han hao har hca hcc hce hch hck hcn hco hcr he- hea hec hee heh hek hen heo her hha hhc hhe hhh hhk hhn hho hhr hka hkh hkk hkn hko hkr hna hnc hne hnh hnk hnn hno hoa hoc hoe hoh hok hon hoo hor hr- hra hrc hre hrh hrk hrn hro hrr ka- kaa kac kae kah kak kan kao kar kca kcc kce kch kck kcn kcr ke- kea kec kee keh kek ken keo ker kha khe khh khk khn kho khr kkc kke kkh kkk kkn kkr kn- kna knc kne knk knn kno knr koa koc koe koh kok kon koo kor kra krc krk krn kro krr naa nac nae nah nak nan nao nar nca ncc nce nch nck ncn nco ncr ne- nea nec nee neh nek nen neo ner nha nhc nhe nhh nhk nhn nhr nka nkc nke nkk nkn nko nkr nna nnc nne nnh nnk nnn nno no- noa noc noe noh nok non noo nor nra nrc nre nrk nrn nro nrr oaa oac oae oah oak oan oao oar oc- oca occ och ock ocn oco ocr oea oec oee oeh oen oeo oer oha ohc ohe ohh ohn oho ohr oka okc oke okk oko okr on- ona onc one onh onk onn ono onr oo- ooa ooc ooh ook oon ooo oor or- ora orc ore orh ork orn oro orr ra- raa rac rae rah rak ran rao rar rca rcc rce rch rcn rco rcr re- rea rec ree reh rek ren reo rer rh- rha rhc rhe rhh rhn rho rhr rkc rke rkk rko rna rnc rnh rnn rno rnr roa roc roe roh rok ron roo ror rra rrc rrh rrk rrn rrr