-up c-- ccc ccp ccs ccu cpc cpp cps cpu csc csp css csu csy cuc cup cus cuu cuy cyc cyp cys p-p pcc pcp pcs pcu ppc ppp pps ppu ps- psc psp pss psu psy puc pup pus puu puy py- pyc pys pyu scc scp scs scu spc spp sps spu spy ss- ssc ssp sss ssu suc sup sus suu suy sy- syc syp sys syu ucc ucp ucs ucu up- upc upp ups upu usc usp uss usu uuc uus uuu uyc uys uyu ycc ycp ycs ycu ycy yps ypu ysc ysp yss ysu ysy yup yus yuu yuy yyc yys yyu yyy