rcp rcr rcs rct re- rea reb rec ree rei rek rel rep rer res ret ria rib ric rie rii rik ril rip rir ris rit rkb rkc rke rkk rkp rks rkt rla rlc rle rli rll rlp rlr rls rlt rpa rpb rpc rpe rpi rpk rpl rpp rpr rps rpt rra rrb rrc rri rrk rrl rrp rrr rrs rrt rsa rsb rsc rse rsi rsk rsl rsp rsr rss rst rta rtb rtc rte rti rtk rtl rtp rtr rts rtt saa sab sac sae sai sak sal sap sar sas sat sba sbb sbc sbe sbi sbk sbl sbp sbr sbs sbt sca scb scc sce sci sck scl scp scr scs sct se- sea seb sec see sei sek sel sep ser ses set sia sib sic sie sii sik sil sip sir sis sit sk- ska skb skc ske ski skk skl skp skr sks skt sla slb slc sle sli slk sll slp slr sls slt spa spb spc spe spi spk spl spp spr sps spt sr- sra srb src sre sri srk srl srp srr srs srt ss- ssa ssb ssc sse ssi ssk ssl ssp ssr sss sst sta stb stc ste sti stk stl stp str sts stt taa tab tac tae tai tak tal tap tar tas tat tba tbb tbc tbe tbi tbk tbl tbp tbr tbs tbt tca tcb tcc tce tci tck tcl tcp tcr tcs tct te- tea teb tec tee tei tek tel tep ter tes tet tia tib tic tie tii tik til tip tir tis tit tka tkb tkc tke tkk tkl tkp tkr tks tkt tla tlc tle tli tlk tll tlp tlr tls tlt tpa tpb tpc tpe tpi tpk tpl tpp tpr tps tpt tra trb trc tre tri trk trl trp trr trs trt tsa tsb tsc tse tsi tsk tsl tsp tsr tss tst tta ttb ttc tte tti ttk ttl ttp ttr tts ttt