ptm ptn pto ptp ptr pts ptt ra- raa rab rac rai ram ran rao rap rar ras rat rba rbb rbc rbi rbm rbn rbo rbp rbr rbs rbt rca rcb rcc rci rcm rcn rco rcp rcr rcs rct ria rib ric rii rim rin rio rip rir ris rit rma rmb rmc rmi rmm rmn rmo rmp rmr rms rmt rna rnb rnc rni rnm rnn rno rnp rnr rns rnt roa rob roc roi rom ron roo rop ror ros rot rpa rpb rpc rpi rpm rpn rpo rpp rpr rps rpt rra rrb rrc rri rrm rrn rrp rrr rrs rrt rsa rsb rsc rsi rsm rsn rso rsp rsr rss rst rta rtb rtc rti rtm rtn rto rtp rtr rts rtt saa sab sac sai sam san sao sap sar sas sat sba sbb sbc sbi sbm sbn sbo sbp sbr sbs sbt sca scb scc sci scm scn sco scp scr scs sct sia sib sic sii sim sin sio sip sir sis sit sma smb smc smi smm smn smo smp smr sms smt sna snb snc sni snm snn sno snp snr sns snt soa sob soc soi som son soo sop sor sos sot spa spb spc spi spm spn spo spp spr sps spt sr- sra srb src sri srm srn sro srp srr srs srt ss- ssa ssb ssc ssi ssm ssn sso ssp ssr sss sst sta stb stc sti stm stn sto stp str sts stt taa tab tac tai tam tan tao tap tar tas tat tba tbb tbc tbi tbm tbn tbo tbp tbr tbs tbt tca tcb tcc tci tcm tcn tco tcp tcr tcs tct tia tib tic tii tim tin tio tip tir tis tit tma tmb tmc tmi tmm tmn tmo tmp tmr tms tmt tna tnb tnc tni tnm tnn tno tnp tnr tns tnt to- toa tob toc toi tom ton too top tor tos tot tpa tpb tpc tpi tpm tpn tpo tpp tpr tps tpt tra trb trc tri trm trn tro trp trr trs trt tsa tsb tsc tsi tsm tsn tso tsp tsr tss tst tta ttb ttc tti ttm ttn tto ttp ttr tts ttt