c-- ccc cce ccl ccm ccn cct ce- cec cee cel cem cen cet cl- clc cle cll clm cln clt cmc cme cml cmm cmn cmt cn- cnc cne cnl cnm cnn cnt ctc cte ctl ctm ctn ctt ec- ecc ece ecl ecm ecn ect eec eee eel eem een eet elc ele ell elm eln elt em- emc eme eml emm emn emt en- enc ene enl enm enn ent etc ete etl etm etn ett lcc lce lcl lcm lcn lct lec lee lel lem len let llc lle lll llm lln llt lmc lme lml lmm lmn lmt lnc lne lnl lnm lnn lnt ltc lte ltl ltm ltt mc- mcc mce mcl mcm mcn mct mec mee mel mem men met mlc mle mll mlm mln mlt mmc mme mml mmm mmn mmt mnc mne mnl mnm mnn mnt mtc mte mtl mtm mtn mtt ncc nce ncl ncm ncn nct ne- nec nee nel nem nen net nlc nle nll nlm nln nlt nmc nme nml nmm nmn nmt nnc nne nnl nnm nnn nnt ntc nte ntm ntn ntt tcc tce tcl tcm tcn tct te- tec tee tel tem ten tet tlc tle tll tlm tln tlt tmc tme tml tmm tmn tmt tnc tne tnl tnm tnn tnt ttc tte ttl ttm ttn ttt