-ey c-- ccc cce cco ccp ccs ccx ce- cec cee ceo cep ces cex cey co- coc coe coo cop cos cox coy cpc cpe cpo cpp cps cpx csc cse cso csp css csx csy cxc cxo cxp cxs cxx cyc cye cyo cyp cys ec- ecc ece eco ecs ecx eec eee eeo eep ees eex eey eo- eoc eoe eoo eop eos ep- epc epe epo epp eps epx es- esc ese eso esp ess esx esy ex- exc exe exo exp exs exx exy eyc eye eyo eyp eys oc- occ oco ocp ocs ocx oec oee oeo oep oes oex oey oo- ooc ooo oop oos oox op- opc ope opo opp ops opx opy os- osc ose oso osp oss osx ox- oxc oxo oxx oxy oye oyo oys p-p pcc pce pco pcp pcs pcx pec pee peo pep pes pex pey poc poe poo pop pos pox poy ppc ppe ppo ppp pps ppx ps- psc pse pso psp pss psx psy pxc pxe pxs py- pyc pye pyo pys pyx scc sce sco scp scs scx se- sec see seo sep ses sex sey soc soe soo sop sos sox soy spc spe spo spp sps spx spy ss- ssc sse sso ssp sss ssx sxc sxs sy- syc sye syp sys syx xcp xcx xee xep xes xex xoc xoo xop xos xox xpc xpe xpo xpp xps xsc xsp xss xxo xxp xxx xxy xyp xyy ycc yce yco ycp ycs ycy yec yee yeo yep yes yex yey yoc yoe yoo yop yos yox yoy ypo yps ysc yse yso ysp yss ysy yxe yxy yyc yye yys yyy