-er a-a a-b aaa aab aad aae aaf aam aar aas ab- aba abb abd abe abf abm abr abs ad- ada adb add ade adf adm adr ads aea aeb aed aee aef aem aer aes af- afa afb afd afe aff afm afr afs ama amb amd ame amf amm amr ams ar- ara arb ard are arf arm arr ars as- asa asb asd ase asf asm asr ass baa bab bad bae baf bam bar bas bba bbb bbd bbe bbf bbm bbr bbs bda bdb bdd bde bdf bdm bdr bds be- bea beb bed bee bef bem ber bes bfa bfb bfd bfe bff bfm bfr bfs bma bmb bmd bme bmf bmm bmr bms bra brb brd bre brf brm brr brs bsa bsb bsd bse bsf bsm bsr bss daa dab dad dae daf dam dar das dba dbb dbd dbe dbf dbm dbr dbs dda ddb ddd dde ddf ddm ddr dds de- dea deb ded dee def dem der des dfa dfb dfd dfe dff dfm dfr dfs dma dmb dmd dme dmf dmm dmr dms dra drb drd dre drm drr drs dsa dsb dsd dse dsf dsm dsr dss eaa eab ead eae eaf eam ear eas eba ebb ebd ebe ebf ebm ebr ebs ed- eda edb edd ede edf edm edr eds eea eeb eed eee eef eem eer ees ef- efa efb efd efe eff efm efr efs em- ema emb emd eme emf emm emr ems era erb erd ere erf erm err ers es- esa esb esd ese esf esm esr ess faa fab fad fae faf fam far fas fba fbb fbd fbe fbf fbm fbr fbs fda fdb fdd fde fdf fdm fdr fds fea feb fed fee fef fem fer fes ffa ffd ffe fff ffm ffr ffs fma fmb fmd fme fmf fmm fmr fms fra frb frd fre frf frm frr frs fsa fsb fsd fse fsf fsm fsr fss m-f m-r maa mab mad mae maf mam mar mas mba mbb mbd mbe mbf mbm mbr mbs mda mdb mdd mde mdf mdm mdr mds mea meb med mee mef mem mer mes mfa mfb mfd mfe mff mfm mfr mfs mma mmb mmd mme mmf mmm mmr mms mra mrb mrd mre mrf mrm mrr mrs msa msb msd mse msf msm msr mss ra- raa rab rad rae raf ram rar ras rba rbb rbd rbe rbf rbm rbr rbs rda rdb rdd rde rdf rdm rdr rds re- rea reb red ree ref rem rer res rfa rfb rfd rfe rff rfm rfr rfs rma rmb rmd rme rmf rmm rmr rms rra rrb rrd rrf rrm rrr rrs rsa rsb rsd rse rsf rsm rsr rss saa sab sad sae saf sam sar sas sba sbb sbd sbe sbf sbm sbr sbs sda sdb sdd sde sdf sdm sdr sds se- sea seb sed see sef sem ser ses sfa sfb sfd sfe sff sfm sfr sfs sma smb smd sme smf smm smr sms sr- sra srb srd sre srf srm srr srs ss- ssa ssb ssd sse ssf ssm ssr sss