c-- ccc cce cco ccp cct ce- cec cee ceo cep cet co- coc coe coo cop cot cpc cpe cpo cpp cpt ctc cte cto ctp ctt ec- ecc ece eco ect eec eee eeo eep eet eo- eoc eoe eoo eop eot ep- epc epe epo epp ept etc ete eto etp ett oc- occ oco ocp oct oec oee oeo oep oet oo- ooc ooo oop oot op- opc ope opo opp opt ot- otc ote oto otp ott p-p pcc pce pco pcp pct pec pee peo pep pet poc poe poo pop pot ppc ppe ppo ppp ppt pt- ptc pte pto ptp ptt tcc tce tco tcp tct te- tec tee teo tep tet to- toc toe too top tot tpc tpe tpo tpp tpt ttc tte tto ttp ttt