ptd pte pti ptn pto ptp ptr pts ptt ra- raa rac rad rae rai ran rao rap rar ras rat rca rcc rcd rce rci rcn rco rcp rcr rcs rct rda rdc rdd rde rdi rdn rdo rdp rdr rds rdt re- rea rec red ree rei ren reo rep rer res ret ria ric rid rie rii rin rio rip rir ris rit rna rnc rnd rni rnn rno rnp rnr rns rnt roa roc rod roe roi ron roo rop ror ros rot rpa rpc rpd rpe rpi rpn rpo rpp rpr rps rpt rra rrc rrd rri rrn rrp rrr rrs rrt rsa rsc rsd rse rsi rsn rso rsp rsr rss rst rta rtc rtd rte rti rtn rto rtp rtr rts rtt saa sac sad sae sai san sao sap sar sas sat sca scc scd sce sci scn sco scp scr scs sct sda sdc sdd sde sdi sdn sdo sdp sdr sds sdt se- sea sec sed see sei sen seo sep ser ses set sia sic sid sie sii sin sio sip sir sis sit sna snc snd sne sni snn sno snp snr sns snt soa soc sod soe soi son soo sop sor sos sot spa spc spd spe spi spn spo spp spr sps spt sr- sra src srd sre sri srn sro srp srr srs srt ss- ssa ssc ssd sse ssi ssn sso ssp ssr sss sst sta stc std ste sti stn sto stp str sts stt taa tac tad tae tai tan tao tap tar tas tat tca tcc tcd tce tci tcn tco tcp tcr tcs tct tda tdc tdd tde tdi tdn tdo tdp tdr tds tdt te- tea tec ted tee tei ten teo tep ter tes tet tia tic tid tie tii tin tio tip tir tis tit tna tnc tnd tne tni tnn tno tnp tnr tns tnt to- toa toc tod toe toi ton too top tor tos tot tpa tpc tpd tpe tpi tpn tpo tpp tpr tps tpt tra trc trd tre tri trn tro trp trr trs trt tsa tsc tsd tse tsi tsn tso tsp tsr tss tst tta ttc ttd tte tti ttn tto ttp ttr tts ttt