-er a-a a-c aaa aac aad aae aag aah aak aar ac- aca acc acd ace acg ach ack acr ad- ada adc add ade adg adh adk adr aea aec aed aee aeg aeh aek aer ag- aga agc agd age agg agh agk agr aha ahc ahd ahe ahg ahh ahk ahr aka akc akd ake akg akh akk akr ar- ara arc ard are arg arh ark arr c-- caa cac cad cae cag cah cak car cca ccc ccd cce ccg cch cck ccr cda cdc cdd cde cdg cdh cdk cdr ce- cea cec ced cee ceg ceh cek cer cga cgc cgd cge cgg cgh cgr ch- cha chc chd che chg chh chk chr cka ckc ckd ckh cra crc crd cre crg crh crk crr daa dac dad dae dag dah dak dar dca dcc dcd dce dcg dck dcr dda ddc ddd dde ddg ddh ddk ddr de- dea dec ded dee deg deh dek der dga dgc dgd dge dgg dgh dgk dgr dh- dha dhc dhd dhe dhh dhk dhr dka dkc dke dkg dkk dkr dra drc drd dre drg drk drr eaa eac ead eae eag eah eak ear ec- eca ecc ecd ece ecg ech eck ecr ed- eda edc edd ede edg edh edk edr eea eec eed eee eeg eek eer ega egc egd ege egg egh egr eha ehc ehd ehe ehg ehh ehr eka ekc ekd eke ekg ekh ekr era erc erd ere erg erh erk err g-d gaa gac gad gae gag gah gak gar gca gcc gcd gce gcg gch gck gcr gda gdc gdd gde gdh gdk gdr ge- gea gec ged gee geg geh gek ger gga ggc ggd ggg ggh ggr gha ghc ghd ghe ghg ghh ghr gka gkd gkh gra grc grd gre grg grh grk grr haa hac had hae hag hah hak har hca hcc hcd hce hcg hch hck hcr hda hdc hdd hde hdg hdh hdk hdr he- hea hec hed hee heg heh hek her hga hgc hge hgg hgh hgk hgr hha hhc hhd hhe hhg hhh hhk hhr hka hkd hkg hkh hkk hkr hr- hra hrc hrd hre hrg hrh hrk hrr ka- kaa kac kad kae kag kah kak kar kca kcc kcd kce kcg kch kck kcr kda kdc kde kdg kdh kdk kdr ke- kea kec ked kee keg keh kek ker kga kgc kgd kgh kha khe khh khk khr kkc kke kkh kkk kkr kra krc krd krg krk krr ra- raa rac rad rae rag rah rak rar rca rcc rcd rce rcg rch rcr rda rdc rdd rde rdg rdh rdr re- rea rec red ree reg reh rek rer rga rgc rgd rge rgg rgh rgk rgr rh- rha rhc rhd rhe rhg rhh rhr rkc rke rkg rkk rra rrc rrd rrg rrh rrk rrr