rit rkb rkg rkk rko rkp rks rkt rna rnb rng rni rnn rno rnp rnr rns rnt roa rob rog roi rok ron roo rop ror ros rot rpa rpb rpg rpi rpk rpn rpo rpp rpr rps rpt rra rrb rrg rri rrk rrn rrp rrr rrs rrt rsa rsb rsg rsi rsk rsn rso rsp rsr rss rst rta rtb rtg rti rtk rtn rto rtp rtr rts rtt saa sab sag sai sak san sao sap sar sas sat sba sbb sbg sbi sbk sbn sbo sbp sbr sbs sbt sga sgb sgg sgi sgk sgn sgo sgp sgr sgs sgt sia sib sig sii sik sin sio sip sir sis sit sk- ska skb skg ski skk sko skp skr sks skt sna snb sng sni snk snn sno snp snr sns snt soa sob sog soi sok son soo sop sor sos sot spa spb spg spi spk spn spo spp spr sps spt sr- sra srb srg sri srk srn sro srp srr srs srt ss- ssa ssb ssg ssi ssk ssn sso ssp ssr sss sst sta stb stg sti stk stn sto stp str sts stt taa tab tag tai tak tan tao tap tar tas tat tba tbb tbg tbi tbk tbn tbo tbp tbr tbs tbt tga tgb tgg tgi tgk tgn tgo tgp tgr tgs tgt tia tib tig tii tik tin tio tip tir tis tit tka tkb tkg tkk tko tkp tkr tks tkt tna tnb tng tni tnk tnn tno tnp tnr tns tnt to- toa tob tog toi tok ton too top tor tos tot tpa tpb tpg tpi tpk tpn tpo tpp tpr tps tpt tra trb trg tri trk trn tro trp trr trs trt tsa tsb tsg tsi tsk tsn tso tsp tsr tss tst tta ttb ttg tti ttk ttn tto ttp ttr tts ttt