-up c-- ccc cce cco ccp ccu ccx ce- cec cee ceo cep ceu cex co- coc coe coo cop cou cox cpc cpe cpo cpp cpu cpx cuc cue cuo cup cuu cxc cxo cxp cxx ec- ecc ece eco ecu ecx eec eee eeo eep eex eo- eoc eoe eoo eop eou ep- epc epe epo epp epu epx eu- euc eue eup eux ex- exc exe exo exp exu exx oc- occ oco ocp ocu ocx oec oee oeo oep oex oo- ooc ooo oop oox op- opc ope opo opp opx ou- ouc oue ouo oup ox- oxc oxo oxx p-p pcc pce pco pcp pcu pcx pec pee peo pep peu pex poc poe poo pop pou pox ppc ppe ppo ppp ppu ppx puc pue pup puu pxc pxe ucc uce uco ucp ucu uec uee uep uoc uoe uoo uop uox up- upc upe upo upp upu upx uuc uue uuu uxc uxo uxu xcp xcx xee xep xeu xex xoc xoo xop xox xpc xpe xpo xpp xue xup xxo xxp xxx