c-- ccc ccn cco ccp ccs cct cn- cnc cnn cno cnp cns cnt co- coc con coo cop cos cot cpc cpn cpo cpp cps cpt csc csn cso csp css cst ctc ctn cto ctp cts ctt ncc ncn nco ncp ncs nct nnc nnn nno nnp nns nnt no- noc non noo nop nos not npc npn npo npp nps npt nsc nsn nso nsp nss nst ntc ntn nto ntp nts ntt oc- occ ocn oco ocp ocs oct on- onc onn ono onp ons ont oo- ooc oon ooo oop oos oot op- opc opn opo opp ops opt os- osc osn oso osp oss ost ot- otc otn oto otp ots ott p-p pcc pcn pco pcp pcs pct pn- pnc pnn pno pnp pns pnt poc pon poo pop pos pot ppc ppn ppo ppp pps ppt ps- psc psn pso psp pss pst pt- ptc ptn pto ptp pts ptt scc scn sco scp scs sct snc snn sno snp sns snt soc son soo sop sos sot spc spn spo spp sps spt ss- ssc ssn sso ssp sss sst stc stn sto stp sts stt tcc tcn tco tcp tcs tct tnc tnn tno tnp tns tnt to- toc ton too top tos tot tpc tpn tpo tpp tps tpt tsc tsn tso tsp tss tst ttc ttn tto ttp tts ttt