-ic c-- ccc cci cco ccp ccr ccs cct ci- cic cii cio cip cir cis cit co- coc coi coo cop cor cos cot cpc cpi cpo cpp cpr cps cpt crc cri cro crp crr crs crt csc csi cso csp csr css cst ctc cti cto ctp ctr cts ctt icc ici ico icp icr ics ict iic iii iio iip iir iis iit io- ioc ioi ioo iop ior ios iot ipc ipi ipo ipp ipr ips ipt ir- irc iri iro irp irr irs irt is- isc isi iso isp isr iss ist itc iti ito itp its itt o-i oc- occ oci oco ocp ocr ocs oct oic oii oio oip oir ois oit oo- ooc ooi ooo oop oor oos oot op- opc opi opo opp opr ops opt or- orc ori oro orp orr ors ort os- osc osi oso osp osr oss ost ot- otc oti oto otp otr ots ott p-p pcc pci pco pcp pcr pcs pct pic pii pio pip pir pis pit poc poi poo pop por pos pot ppc ppi ppo ppp ppr pps ppt prc pri pro prp prr prs prt ps- psc psi pso psp psr pss pst pt- ptc pti pto ptp ptr pts ptt rcc rci rco rcp rcr rcs rct ric rii rio rip rir ris rit roc roi roo rop ror ros rot rpc rpi rpo rpp rpr rps rpt rrc rri rrp rrr rrs rrt rsc rsi rso rsp rsr rss rst rtc rti rto rtp rtr rts rtt scc sci sco scp scr scs sct sic sii sio sip sir sis sit soc soi soo sop sor sos sot spc spi spo spp spr sps spt sr- src sri sro srp srr srs srt ss- ssc ssi sso ssp ssr sss sst stc sti sto stp str sts stt tcc tci tco tcp tcr tcs tct tic tii tio tip tir tis tit to- toc toi too top tor tos tot tpc tpi tpo tpp tpr tps tpt trc tri tro trp trr trs trt tsc tsi tso tsp tsr tss tst ttc tti tto ttp ttr tts ttt