-er bbb bbe bbf bbm bbr bbs bbt be- beb bee bef bem ber bes bet bfb bfe bff bfm bfr bfs bft bmb bme bmf bmm bmr bms bmt brb bre brf brm brr brs brt bsb bse bsf bsm bsr bss bst btb bte btf btm btr bts btt ebb ebe ebf ebm ebr ebs ebt eeb eee eef eem eer ees eet ef- efb efe eff efm efr efs eft em- emb eme emf emm emr ems emt erb ere erf erm err ers ert es- esb ese esf esm esr ess est etb ete etf etm etr ets ett fbb fbe fbf fbm fbr fbs fbt feb fee fef fem fer fes fet ffe fff ffm ffr ffs fft fmb fme fmf fmm fmr fms fmt frb fre frf frm frr frs frt fsb fse fsf fsm fsr fss fst ftb fte ftf ftm ftr fts ftt m-f m-r mbb mbe mbf mbm mbr mbs mbt meb mee mef mem mer mes met mfb mfe mff mfm mfr mfs mft mmb mme mmf mmm mmr mms mmt mrb mre mrf mrm mrr mrs mrt msb mse msf msm msr mss mst mtb mte mtf mtm mtr mts mtt rbb rbe rbf rbm rbr rbs rbt re- reb ree ref rem rer res ret rfb rfe rff rfm rfr rfs rft rmb rme rmf rmm rmr rms rmt rrb rrf rrm rrr rrs rrt rsb rse rsf rsm rsr rss rst rtb rte rtf rtm rtr rts rtt sbb sbe sbf sbm sbr sbs sbt se- seb see sef sem ser ses set sfb sfe sff sfm sfr sfs sft smb sme smf smm smr sms smt sr- srb sre srf srm srr srs srt ss- ssb sse ssf ssm ssr sss sst stb ste stf stm str sts stt tbb tbe tbf tbm tbr tbs tbt te- teb tee tef tem ter tes tet tfb tfe tff tfm tfr tfs tft tmb tme tmf tmm tmr tms tmt trb tre trf trm trr trs trt tsb tse tsf tsm tsr tss tst ttb tte ttf ttm ttr tts ttt