-up p-p ppp ppr pps ppt ppu prp prr prs prt pru ps- psp psr pss pst psu pt- ptp ptr pts ptt ptu pup pur pus put puu rpp rpr rps rpt rpu rrp rrr rrs rrt rru rsp rsr rss rst rsu rtp rtr rts rtt rtu rup rur rus rut ruu spp spr sps spt spu sr- srp srr srs srt ss- ssp ssr sss sst ssu stp str sts stt stu sup sur sus sut suu tpp tpr tps tpt tpu trp trr trs trt tru tsp tsr tss tst tsu ttp ttr tts ttt ttu tup tur tus tut tuu up- upp upr ups upt upu ur- urp urr urs urt uru usp usr uss ust usu utp utr uts utt utu uur uus uut uuu