rbl rbo rbr rbs rbt rca rcb rcc rce rcg rch rcl rco rcr rcs rct re- rea reb rec ree reg reh rel reo rer res ret rga rgb rgc rge rgg rgh rgo rgr rgs rgt rh- rha rhb rhc rhe rhg rhh rhl rho rhr rhs rht rla rlc rle rlg rlh rll rlo rlr rls rlt roa rob roc roe rog roh rol roo ror ros rot rra rrb rrc rrg rrh rrl rrr rrs rrt rsa rsb rsc rse rsg rsh rsl rso rsr rss rst rta rtb rtc rte rtg rtl rto rtr rts rtt saa sab sac sae sag sah sal sao sar sas sat sba sbb sbc sbe sbg sbh sbl sbo sbr sbs sbt sca scb scc sce scg sch scl sco scr scs sct se- sea seb sec see seg seh sel seo ser ses set sga sgb sgc sge sgg sgh sgl sgo sgr sgs sgt sh- sha shb shc she shg shh shl sho shr shs sht sla slb slc sle slg slh sll slo slr sls slt soa sob soc soe sog soh sol soo sor sos sot sr- sra srb src sre srg srh srl sro srr srs srt ss- ssa ssb ssc sse ssg ssh ssl sso ssr sss sst sta stb stc ste stg sth stl sto str sts stt taa tab tac tae tag tah tal tao tar tas tat tba tbb tbc tbe tbg tbh tbl tbo tbr tbs tbt tca tcb tcc tce tcg tch tcl tco tcr tcs tct te- tea teb tec tee teg teh tel teo ter tes tet tga tgb tgc tge tgg tgh tgl tgo tgr tgs tgt th- tha thb thc the thg thh thl tho thr ths tht tla tlc tle tlg tlh tll tlo tlr tls tlt to- toa tob toc toe tog toh tol too tor tos tot tra trb trc tre trg trh trl tro trr trs trt tsa tsb tsc tse tsg tsh tsl tso tsr tss tst tta ttb ttc tte ttg tth ttl tto ttr tts ttt