c-- ccc cce ccn cco ccp ccs cct ce- cec cee cen ceo cep ces cet cn- cnc cne cnn cno cnp cns cnt co- coc coe con coo cop cos cot cpc cpe cpn cpo cpp cps cpt csc cse csn cso csp css cst ctc cte ctn cto ctp cts ctt ec- ecc ece ecn eco ecs ect eec eee een eeo eep ees eet en- enc ene enn eno enp ens ent eo- eoc eoe eon eoo eop eos eot ep- epc epe epn epo epp eps ept es- esc ese esn eso esp ess est etc ete etn eto etp ets ett ncc nce ncn nco ncp ncs nct ne- nec nee nen neo nep nes net nnc nne nnn nno nnp nns nnt no- noc noe non noo nop nos not npc npe npn npo npp nps npt nsc nse nsn nso nsp nss nst ntc nte ntn nto ntp nts ntt oc- occ ocn oco ocp ocs oct oec oee oen oeo oep oes oet on- onc one onn ono onp ons ont oo- ooc oon ooo oop oos oot op- opc ope opn opo opp ops opt os- osc ose osn oso osp oss ost ot- otc ote otn oto otp ots ott p-p pcc pce pcn pco pcp pcs pct pec pee pen peo pep pes pet pn- pnc pne pnn pno pnp pns pnt poc poe pon poo pop pos pot ppc ppe ppn ppo ppp pps ppt ps- psc pse psn pso psp pss pst pt- ptc pte ptn pto ptp pts ptt scc sce scn sco scp scs sct se- sec see sen seo sep ses set snc sne snn sno snp sns snt soc soe son soo sop sos sot spc spe spn spo spp sps spt ss- ssc sse ssn sso ssp sss sst stc ste stn sto stp sts stt tcc tce tcn tco tcp tcs tct te- tec tee ten teo tep tes tet tnc tne tnn tno tnp tns tnt to- toc toe ton too top tos tot tpc tpe tpn tpo tpp tps tpt tsc tse tsn tso tsp tss tst ttc tte ttn tto ttp tts ttt