raa rad rae raf rai ran rao rap rar ras rat rda rdd rde rdf rdi rdn rdo rdp rdr rds rdt re- rea red ree ref rei ren reo rep rer res ret rfa rfd rfe rff rfi rfn rfo rfp rfr rfs rft ria rid rie rif rii rin rio rip rir ris rit rna rnd rni rnn rno rnp rnr rns rnt roa rod roe rof roi ron roo rop ror ros rot rpa rpd rpe rpf rpi rpn rpo rpp rpr rps rpt rra rrd rrf rri rrn rrp rrr rrs rrt rsa rsd rse rsf rsi rsn rso rsp rsr rss rst rta rtd rte rtf rti rtn rto rtp rtr rts rtt saa sad sae saf sai san sao sap sar sas sat sda sdd sde sdf sdi sdn sdo sdp sdr sds sdt se- sea sed see sef sei sen seo sep ser ses set sfa sfd sfe sff sfi sfn sfo sfp sfr sfs sft sia sid sie sif sii sin sio sip sir sis sit sna snd sne snf sni snn sno snp snr sns snt soa sod soe sof soi son soo sop sor sos sot spa spd spe spf spi spn spo spp spr sps spt sr- sra srd sre srf sri srn sro srp srr srs srt ss- ssa ssd sse ssf ssi ssn sso ssp ssr sss sst sta std ste stf sti stn sto stp str sts stt taa tad tae taf tai tan tao tap tar tas tat tda tdd tde tdf tdi tdn tdo tdp tdr tds tdt te- tea ted tee tef tei ten teo tep ter tes tet tfa tfd tfe tff tfi tfn tfo tfp tfr tfs tft tia tid tie tif tii tin tio tip tir tis tit tna tnd tne tnf tni tnn tno tnp tnr tns tnt to- toa tod toe tof toi ton too top tor tos tot tpa tpd tpe tpf tpi tpn tpo tpp tpr tps tpt tra trd tre trf tri trn tro trp trr trs trt tsa tsd tse tsf tsi tsn tso tsp tsr tss tst tta ttd tte ttf tti ttn tto ttp ttr tts ttt