c-- ccc ccd cce ccm ccn cct cdc cdd cde cdm cdn cdt ce- cec ced cee cem cen cet cmc cmd cme cmm cmn cmt cn- cnc cnd cne cnm cnn cnt ctc ctd cte ctm ctn ctt dcc dcd dce dcm dcn dct ddc ddd dde ddm ddn ddt de- dec ded dee dem den det dmc dmd dme dmm dmn dmt dnc dnd dne dnm dnn dnt dtc dtd dte dtm dtn dtt ec- ecc ecd ece ecm ecn ect ed- edc edd ede edm edn edt eec eed eee eem een eet em- emc emd eme emm emn emt en- enc end ene enm enn ent etc etd ete etm etn ett mc- mcc mcd mce mcm mcn mct mdc mdd mde mdm mdn mdt mec med mee mem men met mmc mmd mme mmm mmn mmt mnc mne mnm mnn mnt mtc mtd mte mtm mtn mtt ncc ncd nce ncm ncn nct ndc ndd nde ndm ndn ndt ne- nec ned nee nem nen net nmc nmd nme nmm nmn nmt nnc nne nnm nnn nnt ntc ntd nte ntm ntn ntt tcc tcd tce tcm tcn tct tdc tdd tde tdm tdn tdt te- tec ted tee tem ten tet tmc tmd tme tmm tmn tmt tnc tnd tne tnm tnn tnt ttc ttd tte ttm ttn ttt