ptl ptn pto ptp ptr pts ptt ra- raa rac rae rai ral ran rao rap rar ras rat rca rcc rce rci rcl rcn rco rcp rcr rcs rct re- rea rec ree rei rel ren reo rep rer res ret ria ric rie rii ril rin rio rip rir ris rit rla rlc rle rli rll rln rlo rlp rlr rls rlt rna rnc rni rnn rno rnp rnr rns rnt roa roc roe roi rol ron roo rop ror ros rot rpa rpc rpe rpi rpl rpn rpo rpp rpr rps rpt rra rrc rri rrl rrn rrp rrr rrs rrt rsa rsc rse rsi rsl rsn rso rsp rsr rss rst rta rtc rte rti rtl rtn rto rtp rtr rts rtt saa sac sae sai sal san sao sap sar sas sat sca scc sce sci scl scn sco scp scr scs sct se- sea sec see sei sel sen seo sep ser ses set sia sic sie sii sil sin sio sip sir sis sit sla slc sle sli sll sln slo slp slr sls slt sna snc sne sni snl snn sno snp snr sns snt soa soc soe soi sol son soo sop sor sos sot spa spc spe spi spl spn spo spp spr sps spt sr- sra src sre sri srl srn sro srp srr srs srt ss- ssa ssc sse ssi ssl ssn sso ssp ssr sss sst sta stc ste sti stl stn sto stp str sts stt taa tac tae tai tal tan tao tap tar tas tat tca tcc tce tci tcl tcn tco tcp tcr tcs tct te- tea tec tee tei tel ten teo tep ter tes tet tia tic tie tii til tin tio tip tir tis tit tla tlc tle tli tll tln tlo tlp tlr tls tlt tna tnc tne tni tnl tnn tno tnp tnr tns tnt to- toa toc toe toi tol ton too top tor tos tot tpa tpc tpe tpi tpl tpn tpo tpp tpr tps tpt tra trc tre tri trl trn tro trp trr trs trt tsa tsc tse tsi tsl tsn tso tsp tsr tss tst tta ttc tte tti ttl ttn tto ttp ttr tts ttt