a-a a-c aaa aac aad aae aak aam ac- aca acc acd ace ack acm ad- ada adc add ade adk adm aea aec aed aee aek aem aka akc akd ake akk akm ama amc amd ame amk amm c-- caa cac cad cae cak cam cca ccc ccd cce cck ccm cda cdc cdd cde cdk cdm ce- cea cec ced cee cek cem cka ckc ckd ckm cma cmc cmd cme cmk cmm daa dac dad dae dak dam dca dcc dcd dce dck dcm dda ddc ddd dde ddk ddm de- dea dec ded dee dek dem dka dkc dke dkk dkm dma dmc dmd dme dmk dmm eaa eac ead eae eak eam ec- eca ecc ecd ece eck ecm ed- eda edc edd ede edk edm eea eec eed eee eek eem eka ekc ekd eke em- ema emc emd eme emk emm ka- kaa kac kad kae kak kam kca kcc kcd kce kck kcm kda kdc kde kdk kdm ke- kea kec ked kee kek kem kkc kke kkk kkm kma kmc kmd kme kmk kmm maa mac mad mae mak mam mc- mca mcc mcd mce mck mcm mda mdc mdd mde mdk mdm mea mec med mee mek mem mka mkc mkd mke mkk mkm mma mmc mmd mme mmk mmm