-er a-a a-c aaa aac aad aae aak aam aar ac- aca acc acd ace ack acm acr ad- ada adc add ade adk adm adr aea aec aed aee aek aem aer aka akc akd ake akk akm akr ama amc amd ame amk amm amr ar- ara arc ard are ark arm arr c-- caa cac cad cae cak cam car cca ccc ccd cce cck ccm ccr cda cdc cdd cde cdk cdm cdr ce- cea cec ced cee cek cem cer cka ckc ckd ckm cma cmc cmd cme cmk cmm cmr cra crc crd cre crk crm crr daa dac dad dae dak dam dar dca dcc dcd dce dck dcm dcr dda ddc ddd dde ddk ddm ddr de- dea dec ded dee dek dem der dka dkc dke dkk dkm dkr dma dmc dmd dme dmk dmm dmr dra drc drd dre drk drm drr eaa eac ead eae eak eam ear ec- eca ecc ecd ece eck ecm ecr ed- eda edc edd ede edk edm edr eea eec eed eee eek eem eer eka ekc ekd eke ekr em- ema emc emd eme emk emm emr era erc erd ere erk erm err ka- kaa kac kad kae kak kam kar kca kcc kcd kce kck kcm kcr kda kdc kde kdk kdm kdr ke- kea kec ked kee kek kem ker kkc kke kkk kkm kkr kma kmc kmd kme kmk kmm kra krc krd krk krr m-r maa mac mad mae mak mam mar mc- mca mcc mcd mce mck mcm mcr mda mdc mdd mde mdk mdm mdr mea mec med mee mek mem mer mka mkc mkd mke mkk mkm mkr mma mmc mmd mme mmk mmm mmr mra mrc mrd mre mrk mrm mrr ra- raa rac rad rae rak ram rar rca rcc rcd rce rcm rcr rda rdc rdd rde rdm rdr re- rea rec red ree rek rem rer rkc rke rkk rkm rma rmc rmd rme rmm rmr rra rrc rrd rrk rrm rrr