-up c-- ccc cck ccp ccs ccu ckc cks cpc cpk cpp cps cpu csc csk csp css csu cuc cuk cup cus cuu kcc kck kcp kcs kcu kkc kkk kkp kks kku kpc kpk kpp kps kpu ksc ksk ksp kss ksu kuc kuk kup kus kuu p-p pcc pck pcp pcs pcu pkc pkp pks pku ppc ppk ppp pps ppu ps- psc psk psp pss psu puc puk pup pus puu scc sck scp scs scu sk- skc skk skp sks sku spc spk spp sps spu ss- ssc ssk ssp sss ssu suc suk sup sus suu ucc uck ucp ucs ucu ukc ukk ukp uku up- upc upk upp ups upu usc usk usp uss usu uuc uus uuu