rat re- rea ree ref reg rei ren reo rep rer res ret rfa rfe rff rfg rfi rfn rfo rfp rfr rfs rft rga rge rgf rgg rgi rgn rgo rgp rgr rgs rgt ria rie rif rig rii rin rio rip rir ris rit rna rng rni rnn rno rnp rnr rns rnt roa roe rof rog roi ron roo rop ror ros rot rpa rpe rpf rpg rpi rpn rpo rpp rpr rps rpt rra rrf rrg rri rrn rrp rrr rrs rrt rsa rse rsf rsg rsi rsn rso rsp rsr rss rst rta rte rtf rtg rti rtn rto rtp rtr rts rtt saa sae saf sag sai san sao sap sar sas sat se- sea see sef seg sei sen seo sep ser ses set sfa sfe sff sfg sfi sfn sfo sfp sfr sfs sft sga sge sgf sgg sgi sgn sgo sgp sgr sgs sgt sia sie sif sig sii sin sio sip sir sis sit sna sne snf sng sni snn sno snp snr sns snt soa soe sof sog soi son soo sop sor sos sot spa spe spf spg spi spn spo spp spr sps spt sr- sra sre srf srg sri srn sro srp srr srs srt ss- ssa sse ssf ssg ssi ssn sso ssp ssr sss sst sta ste stf stg sti stn sto stp str sts stt taa tae taf tag tai tan tao tap tar tas tat te- tea tee tef teg tei ten teo tep ter tes tet tfa tfe tff tfg tfi tfn tfo tfp tfr tfs tft tga tge tgf tgg tgi tgn tgo tgp tgr tgs tgt tia tie tif tig tii tin tio tip tir tis tit tna tne tnf tng tni tnn tno tnp tnr tns tnt to- toa toe tof tog toi ton too top tor tos tot tpa tpe tpf tpg tpi tpn tpo tpp tpr tps tpt tra tre trf trg tri trn tro trp trr trs trt tsa tse tsf tsg tsi tsn tso tsp tsr tss tst tta tte ttf ttg tti ttn tto ttp ttr tts ttt