-up c-- ccc ccp ccr ccs ccu cpc cpp cpr cps cpu crc crp crr crs cru cry csc csp csr css csu csy cuc cup cur cus cuu cuy cyc cyp cyr cys p-p pcc pcp pcr pcs pcu ppc ppp ppr pps ppu prc prp prr prs pru pry ps- psc psp psr pss psu psy puc pup pur pus puu puy py- pyc pyr pys pyu rcc rcp rcr rcs rcu rpc rpp rpr rps rpu rrc rrp rrr rrs rru rsc rsp rsr rss rsu ruc rup rur rus ruu ruy ry- ryc ryr rys ryu ryy scc scp scr scs scu spc spp spr sps spu spy sr- src srp srr srs sry ss- ssc ssp ssr sss ssu suc sup sur sus suu suy sy- syc syp syr sys syu ucc ucp ucr ucs ucu up- upc upp upr ups upu ur- urc urp urr urs uru ury usc usp usr uss usu uuc uur uus uuu uyc uys uyu ycc ycp ycs ycu ycy yps ypu yrc yrp yrs yru ysc ysp ysr yss ysu ysy yup yur yus yuu yuy yyc yys yyu yyy