c-- ccc ccd cce cck ccm ccn cdc cdd cde cdk cdm cdn ce- cec ced cee cek cem cen ckc ckd ckm cmc cmd cme cmk cmm cmn cn- cnc cnd cne cnm cnn dcc dcd dce dck dcm dcn ddc ddd dde ddk ddm ddn de- dec ded dee dek dem den dkc dke dkk dkm dmc dmd dme dmk dmm dmn dnc dnd dne dnk dnm dnn ec- ecc ecd ece eck ecm ecn ed- edc edd ede edk edm edn eec eed eee eek eem een ekc ekd eke em- emc emd eme emk emm emn en- enc end ene enk enm enn kcc kcd kce kck kcm kcn kdc kde kdk kdm ke- kec ked kee kek kem ken kkc kke kkk kkm kkn kmc kmd kme kmk kmm kn- knc knd kne knk knm knn mc- mcc mcd mce mck mcm mcn mdc mdd mde mdk mdm mdn mec med mee mek mem men mkc mkd mke mkk mkm mkn mmc mmd mme mmk mmm mmn mnc mne mnk mnm mnn ncc ncd nce nck ncm ncn ndc ndd nde ndk ndm ndn ne- nec ned nee nek nem nen nkc nke nkk nkm nkn nmc nmd nme nmk nmm nmn nnc nne nnk nnm nnn