ptr pts ptt ra- raa rac raf rai ral ran rao rap rar ras rat rca rcc rcf rci rcl rcn rco rcp rcr rcs rct rfa rfc rff rfi rfl rfn rfo rfp rfr rfs rft ria ric rif rii ril rin rio rip rir ris rit rla rlc rlf rli rll rln rlo rlp rlr rls rlt rna rnc rni rnn rno rnp rnr rns rnt roa roc rof roi rol ron roo rop ror ros rot rpa rpc rpf rpi rpl rpn rpo rpp rpr rps rpt rra rrc rrf rri rrl rrn rrp rrr rrs rrt rsa rsc rsf rsi rsl rsn rso rsp rsr rss rst rta rtc rtf rti rtl rtn rto rtp rtr rts rtt saa sac saf sai sal san sao sap sar sas sat sca scc scf sci scl scn sco scp scr scs sct sfa sfc sff sfi sfl sfn sfo sfp sfr sfs sft sia sic sif sii sil sin sio sip sir sis sit sla slc slf sli sll sln slo slp slr sls slt sna snc snf sni snl snn sno snp snr sns snt soa soc sof soi sol son soo sop sor sos sot spa spc spf spi spl spn spo spp spr sps spt sr- sra src srf sri srl srn sro srp srr srs srt ss- ssa ssc ssf ssi ssl ssn sso ssp ssr sss sst sta stc stf sti stl stn sto stp str sts stt taa tac taf tai tal tan tao tap tar tas tat tca tcc tcf tci tcl tcn tco tcp tcr tcs tct tfa tfc tff tfi tfl tfn tfo tfp tfr tfs tft tia tic tif tii til tin tio tip tir tis tit tla tlc tlf tli tll tln tlo tlp tlr tls tlt tna tnc tnf tni tnl tnn tno tnp tnr tns tnt to- toa toc tof toi tol ton too top tor tos tot tpa tpc tpf tpi tpl tpn tpo tpp tpr tps tpt tra trc trf tri trl trn tro trp trr trs trt tsa tsc tsf tsi tsl tsn tso tsp tsr tss tst tta ttc ttf tti ttl ttn tto ttp ttr tts ttt