-up c-- ccc ccp ccr ccu cpc cpp cpr cpu crc crp crr cru cry cuc cup cur cuu cuy cyc cyp cyr p-p pcc pcp pcr pcu ppc ppp ppr ppu prc prp prr pru pry puc pup pur puu puy py- pyc pyr pyu rcc rcp rcr rcu rpc rpp rpr rpu rrc rrp rrr rru ruc rup rur ruu ruy ry- ryc ryr ryu ryy ucc ucp ucr ucu up- upc upp upr upu ur- urc urp urr uru ury uuc uur uuu uyc uyu ycc ycp ycu ycy ypu yrc yrp yru yup yur yuu yuy yyc yyu yyy