ptn pto ptp ptr pts ptt ra- raa rac rad rai ral ran rao rap rar ras rat rca rcc rcd rci rcl rcn rco rcp rcr rcs rct rda rdc rdd rdi rdl rdn rdo rdp rdr rds rdt ria ric rid rii ril rin rio rip rir ris rit rla rlc rld rli rll rln rlo rlp rlr rls rlt rna rnc rnd rni rnn rno rnp rnr rns rnt roa roc rod roi rol ron roo rop ror ros rot rpa rpc rpd rpi rpl rpn rpo rpp rpr rps rpt rra rrc rrd rri rrl rrn rrp rrr rrs rrt rsa rsc rsd rsi rsl rsn rso rsp rsr rss rst rta rtc rtd rti rtl rtn rto rtp rtr rts rtt saa sac sad sai sal san sao sap sar sas sat sca scc scd sci scl scn sco scp scr scs sct sda sdc sdd sdi sdl sdn sdo sdp sdr sds sdt sia sic sid sii sil sin sio sip sir sis sit sla slc sld sli sll sln slo slp slr sls slt sna snc snd sni snl snn sno snp snr sns snt soa soc sod soi sol son soo sop sor sos sot spa spc spd spi spl spn spo spp spr sps spt sr- sra src srd sri srl srn sro srp srr srs srt ss- ssa ssc ssd ssi ssl ssn sso ssp ssr sss sst sta stc std sti stl stn sto stp str sts stt taa tac tad tai tal tan tao tap tar tas tat tca tcc tcd tci tcl tcn tco tcp tcr tcs tct tda tdc tdd tdi tdl tdn tdo tdp tdr tds tdt tia tic tid tii til tin tio tip tir tis tit tla tlc tld tli tll tln tlo tlp tlr tls tlt tna tnc tnd tni tnl tnn tno tnp tnr tns tnt to- toa toc tod toi tol ton too top tor tos tot tpa tpc tpd tpi tpl tpn tpo tpp tpr tps tpt tra trc trd tri trl trn tro trp trr trs trt tsa tsc tsd tsi tsl tsn tso tsp tsr tss tst tta ttc ttd tti ttl ttn tto ttp ttr tts ttt