c-- ccc cce ccl ccn ccv ccz ce- cec cee cel cen cev cez cl- clc cle cll cln clv clz cn- cnc cne cnl cnn cnv cvc cve cvl cvn cvv cvz cz- czc cze ec- ecc ece ecl ecn ecv eec eee eel een eev elc ele ell eln elv elz en- enc ene enl enn env enz evc eve evl evn evv eze ezz lcc lce lcl lcn lcv lec lee lel len lev lez llc lle lll lln llv llz lnc lne lnl lnn lvc lve lvl lvn lvv lvz ncc nce ncl ncn ncv ne- nec nee nel nen nev nez nlc nle nll nln nlv nlz nnc nne nnl nnn nnv nnz nvc nve nvl nvn nvv nze nzz v-e vcc vce vcl vcn vec vee vel ven vez vl- vlc vle vll vlv vn- vnl vnv vvc vvv vvz vzn zce zcl zec zee zel zen zev zez znc zne znn zzz