pti ptl pto ptp ptr pts ptt ra- raa rac rad rae rai ral rao rap rar ras rat rca rcc rcd rce rci rcl rco rcp rcr rcs rct rda rdc rdd rde rdi rdl rdo rdp rdr rds rdt re- rea rec red ree rei rel reo rep rer res ret ria ric rid rie rii ril rio rip rir ris rit rla rlc rld rle rli rll rlo rlp rlr rls rlt roa roc rod roe roi rol roo rop ror ros rot rpa rpc rpd rpe rpi rpl rpo rpp rpr rps rpt rra rrc rrd rri rrl rrp rrr rrs rrt rsa rsc rsd rse rsi rsl rso rsp rsr rss rst rta rtc rtd rte rti rtl rto rtp rtr rts rtt saa sac sad sae sai sal sao sap sar sas sat sca scc scd sce sci scl sco scp scr scs sct sda sdc sdd sde sdi sdl sdo sdp sdr sds sdt se- sea sec sed see sei sel seo sep ser ses set sia sic sid sie sii sil sio sip sir sis sit sla slc sld sle sli sll slo slp slr sls slt soa soc sod soe soi sol soo sop sor sos sot spa spc spd spe spi spl spo spp spr sps spt sr- sra src srd sre sri srl sro srp srr srs srt ss- ssa ssc ssd sse ssi ssl sso ssp ssr sss sst sta stc std ste sti stl sto stp str sts stt taa tac tad tae tai tal tao tap tar tas tat tca tcc tcd tce tci tcl tco tcp tcr tcs tct tda tdc tdd tde tdi tdl tdo tdp tdr tds tdt te- tea tec ted tee tei tel teo tep ter tes tet tia tic tid tie tii til tio tip tir tis tit tla tlc tld tle tli tll tlo tlp tlr tls tlt to- toa toc tod toe toi tol too top tor tos tot tpa tpc tpd tpe tpi tpl tpo tpp tpr tps tpt tra trc trd tre tri trl tro trp trr trs trt tsa tsc tsd tse tsi tsl tso tsp tsr tss tst tta ttc ttd tte tti ttl tto ttp ttr tts ttt