-up c-- ccc cco ccp ccr ccs cct ccu co- coc coo cop cor cos cot cou cpc cpo cpp cpr cps cpt cpu crc cro crp crr crs crt cru csc cso csp csr css cst csu ctc cto ctp ctr cts ctt ctu cuc cuo cup cur cus cut cuu oc- occ oco ocp ocr ocs oct ocu oo- ooc ooo oop oor oos oot op- opc opo opp opr ops opt or- orc oro orp orr ors ort oru os- osc oso osp osr oss ost osu ot- otc oto otp otr ots ott otu ou- ouc ouo oup our ous out p-p pcc pco pcp pcr pcs pct pcu poc poo pop por pos pot pou ppc ppo ppp ppr pps ppt ppu prc pro prp prr prs prt pru ps- psc pso psp psr pss pst psu pt- ptc pto ptp ptr pts ptt ptu puc pup pur pus put puu rcc rco rcp rcr rcs rct rcu roc roo rop ror ros rot rou rpc rpo rpp rpr rps rpt rpu rrc rrp rrr rrs rrt rru rsc rso rsp rsr rss rst rsu rtc rto rtp rtr rts rtt rtu ruc ruo rup rur rus rut ruu scc sco scp scr scs sct scu soc soo sop sor sos sot sou spc spo spp spr sps spt spu sr- src sro srp srr srs srt ss- ssc sso ssp ssr sss sst ssu stc sto stp str sts stt stu suc suo sup sur sus sut suu tcc tco tcp tcr tcs tct tcu to- toc too top tor tos tot tou tpc tpo tpp tpr tps tpt tpu trc tro trp trr trs trt tru tsc tso tsp tsr tss tst tsu ttc tto ttp ttr tts ttt ttu tuc tuo tup tur tus tut tuu ucc uco ucp ucr ucs uct ucu uoc uoo uop uor uos uot up- upc upo upp upr ups upt upu ur- urc uro urp urr urs urt uru usc uso usp usr uss ust usu utc uto utp utr uts utt utu uuc uur uus uut uuu