rkk rkm rko rks rkt rla rlc rle rll rlm rln rlo rlr rls rlt rma rmc rme rml rmm rmn rmo rmr rms rmt rna rnc rnm rnn rno rnr rns rnt roa roc roe rok rol rom ron roo ror ros rot rra rrc rrk rrl rrm rrn rrr rrs rrt rsa rsc rse rsk rsl rsm rsn rso rsr rss rst rta rtc rte rtk rtl rtm rtn rto rtr rts rtt saa sac sae sak sal sam san sao sar sas sat sca scc sce sck scl scm scn sco scr scs sct se- sea sec see sek sel sem sen seo ser ses set sk- ska skc ske skk skl skm sko skr sks skt sla slc sle slk sll slm sln slo slr sls slt sma smc sme smk sml smm smn smo smr sms smt sna snc sne snk snl snm snn sno snr sns snt soa soc soe sok sol som son soo sor sos sot sr- sra src sre srk srl srm srn sro srr srs srt ss- ssa ssc sse ssk ssl ssm ssn sso ssr sss sst sta stc ste stk stl stm stn sto str sts stt taa tac tae tak tal tam tan tao tar tas tat tca tcc tce tck tcl tcm tcn tco tcr tcs tct te- tea tec tee tek tel tem ten teo ter tes tet tka tkc tke tkk tkl tkm tko tkr tks tkt tla tlc tle tlk tll tlm tln tlo tlr tls tlt tma tmc tme tmk tml tmm tmn tmo tmr tms tmt tna tnc tne tnk tnl tnm tnn tno tnr tns tnt to- toa toc toe tok tol tom ton too tor tos tot tra trc tre trk trl trm trn tro trr trs trt tsa tsc tse tsk tsl tsm tsn tso tsr tss tst tta ttc tte ttk ttl ttm ttn tto ttr tts ttt