rit rkb rke rkf rkg rkk rks rkt rna rnb rng rni rnn rnr rns rnt rra rrb rrf rrg rri rrk rrn rrr rrs rrt rsa rsb rse rsf rsg rsi rsk rsn rsr rss rst rta rtb rte rtf rtg rti rtk rtn rtr rts rtt saa sab sae saf sag sai sak san sar sas sat sba sbb sbe sbf sbg sbi sbk sbn sbr sbs sbt se- sea seb see sef seg sei sek sen ser ses set sfa sfb sfe sff sfg sfi sfk sfn sfr sfs sft sga sgb sge sgf sgg sgi sgk sgn sgr sgs sgt sia sib sie sif sig sii sik sin sir sis sit sk- ska skb ske skf skg ski skk skr sks skt sna snb sne snf sng sni snk snn snr sns snt sr- sra srb sre srf srg sri srk srn srr srs srt ss- ssa ssb sse ssf ssg ssi ssk ssn ssr sss sst sta stb ste stf stg sti stk stn str sts stt taa tab tae taf tag tai tak tan tar tas tat tba tbb tbe tbf tbg tbi tbk tbn tbr tbs tbt te- tea teb tee tef teg tei tek ten ter tes tet tfa tfb tfe tff tfg tfi tfk tfn tfr tfs tft tga tgb tge tgf tgg tgi tgk tgn tgr tgs tgt tia tib tie tif tig tii tik tin tir tis tit tka tkb tke tkg tkk tkr tks tkt tna tnb tne tnf tng tni tnk tnn tnr tns tnt tra trb tre trf trg tri trk trn trr trs trt tsa tsb tse tsf tsg tsi tsk tsn tsr tss tst tta ttb tte ttf ttg tti ttk ttn ttr tts ttt