ptp ptr pts ptt ra- raa rab rad rae rai ral rao rap rar ras rat rba rbb rbd rbe rbi rbl rbo rbp rbr rbs rbt rda rdb rdd rde rdi rdl rdo rdp rdr rds rdt re- rea reb red ree rei rel reo rep rer res ret ria rib rid rie rii ril rio rip rir ris rit rla rld rle rli rll rlo rlp rlr rls rlt roa rob rod roe roi rol roo rop ror ros rot rpa rpb rpd rpe rpi rpl rpo rpp rpr rps rpt rra rrb rrd rri rrl rrp rrr rrs rrt rsa rsb rsd rse rsi rsl rso rsp rsr rss rst rta rtb rtd rte rti rtl rto rtp rtr rts rtt saa sab sad sae sai sal sao sap sar sas sat sba sbb sbd sbe sbi sbl sbo sbp sbr sbs sbt sda sdb sdd sde sdi sdl sdo sdp sdr sds sdt se- sea seb sed see sei sel seo sep ser ses set sia sib sid sie sii sil sio sip sir sis sit sla slb sld sle sli sll slo slp slr sls slt soa sob sod soe soi sol soo sop sor sos sot spa spb spd spe spi spl spo spp spr sps spt sr- sra srb srd sre sri srl sro srp srr srs srt ss- ssa ssb ssd sse ssi ssl sso ssp ssr sss sst sta stb std ste sti stl sto stp str sts stt taa tab tad tae tai tal tao tap tar tas tat tba tbb tbd tbe tbi tbl tbo tbp tbr tbs tbt tda tdb tdd tde tdi tdl tdo tdp tdr tds tdt te- tea teb ted tee tei tel teo tep ter tes tet tia tib tid tie tii til tio tip tir tis tit tla tld tle tli tll tlo tlp tlr tls tlt to- toa tob tod toe toi tol too top tor tos tot tpa tpb tpd tpe tpi tpl tpo tpp tpr tps tpt tra trb trd tre tri trl tro trp trr trs trt tsa tsb tsd tse tsi tsl tso tsp tsr tss tst tta ttb ttd tte tti ttl tto ttp ttr tts ttt