-up c-- ccc ccp ccr ccs cct ccu cpc cpp cpr cps cpt cpu crc crp crr crs crt cru csc csp csr css cst csu ctc ctp ctr cts ctt ctu cuc cup cur cus cut cuu p-p pcc pcp pcr pcs pct pcu ppc ppp ppr pps ppt ppu prc prp prr prs prt pru ps- psc psp psr pss pst psu pt- ptc ptp ptr pts ptt ptu puc pup pur pus put puu rcc rcp rcr rcs rct rcu rpc rpp rpr rps rpt rpu rrc rrp rrr rrs rrt rru rsc rsp rsr rss rst rsu rtc rtp rtr rts rtt rtu ruc rup rur rus rut ruu scc scp scr scs sct scu spc spp spr sps spt spu sr- src srp srr srs srt ss- ssc ssp ssr sss sst ssu stc stp str sts stt stu suc sup sur sus sut suu tcc tcp tcr tcs tct tcu tpc tpp tpr tps tpt tpu trc trp trr trs trt tru tsc tsp tsr tss tst tsu ttc ttp ttr tts ttt ttu tuc tup tur tus tut tuu ucc ucp ucr ucs uct ucu up- upc upp upr ups upt upu ur- urc urp urr urs urt uru usc usp usr uss ust usu utc utp utr uts utt utu uuc uur uus uut uuu