-up c-- ccc ccd cco ccp ccs ccu cdc cdd cdo cdp cds cdu co- coc cod coo cop cos cou cpc cpd cpo cpp cps cpu csc csd cso csp css csu cuc cud cuo cup cus cuu dcc dcd dco dcp dcs dcu ddc ddd ddo ddp dds ddu doc dod doo dop dos dou dpc dpd dpo dpp dps dpu dsc dsd dso dsp dss dsu duc dud duo dup dus oc- occ ocd oco ocp ocs ocu odc odd odo odp ods odu oo- ooc ood ooo oop oos op- opc opd opo opp ops os- osc osd oso osp oss osu ou- ouc oud ouo oup ous p-p pcc pcd pco pcp pcs pcu pdc pdd pdo pdp pds pdu poc pod poo pop pos pou ppc ppd ppo ppp pps ppu ps- psc psd pso psp pss psu puc pud pup pus puu scc scd sco scp scs scu sdc sdd sdo sdp sds sdu soc sod soo sop sos sou spc spd spo spp sps spu ss- ssc ssd sso ssp sss ssu suc sud suo sup sus suu ucc ucd uco ucp ucs ucu udc udd udo udp uds udu uoc uod uoo uop uos up- upc upd upo upp ups upu usc usd uso usp uss usu uuc uus uuu