-er a-a a-b a-c aaa aab aac aae aaf aah aam aar aas ab- aba abb abc abe abf abh abm abr abs ac- aca acb acc ace acf ach acm acr acs aea aeb aec aee aef aeh aem aer aes af- afa afb afc afe aff afh afm afr afs aha ahb ahc ahe ahf ahh ahm ahr ahs ama amb amc ame amf amh amm amr ams ar- ara arb arc are arf arh arm arr ars as- asa asb asc ase asf ash asm asr ass baa bab bac bae baf bah bam bar bas bba bbb bbc bbe bbf bbh bbm bbr bbs bca bcb bcc bce bcf bch bcm bcr bcs be- bea beb bec bee bef beh bem ber bes bfa bfb bfc bfe bff bfh bfm bfr bfs bha bhb bhc bhe bhf bhh bhm bhr bhs bma bmb bmc bme bmf bmh bmm bmr bms bra brb bre brf brh brm brr brs bsa bsb bsc bse bsf bsh bsm bsr bss c-- caa cab cac cae caf cah cam car cas cba cbb cbc cbe cbf cbh cbm cbr cbs cca ccb ccc cce ccf cch ccm ccr ccs ce- cea ceb cec cee cef ceh cem cer ces cfa cfb cfc cfe cff cfh cfm cfr cfs ch- cha chb chc che chf chh chm chr chs cma cmb cmc cme cmf cmh cmm cmr cms cra crb crc cre crf crh crm crr crs csa csb csc cse csf csh csm csr css eaa eab eac eae eaf eah eam ear eas eba ebb ebc ebe ebf ebh ebm ebr ebs ec- eca ecb ecc ece ecf ech ecm ecr ecs eea eeb eec eee eef eem eer ees ef- efa efb efc efe eff efh efm efr efs eha ehb ehc ehe ehf ehh ehm ehr ehs em- ema emb emc eme emf emh emm emr ems era erb erc ere erf erh erm err ers es- esa esb esc ese esf esh esm esr ess faa fab fac fae faf fah fam far fas fba fbb fbc fbe fbf fbh fbm fbr fbs fca fcb fcc fce fcf fcm fcr fcs fea feb fec fee fef feh fem fer fes ffa ffc ffe fff ffh ffm ffr ffs fha fhb fhc fhe fhf fhh fhm fhr fhs fma fmb fmc fme fmf fmh fmm fmr fms fra frb frc fre frf frh frm frr frs fsa fsb fsc fse fsf fsh fsm fsr fss haa hab hac hae haf hah ham har has hba hbb hbc hbe hbf hbh hbm hbr hbs hca hcb hcc hce hcf hch hcm hcr hcs he- hea heb hec hee hef heh hem her hes hfa hfb hfc hfe hff hfh hfm hfr hfs hha hhb hhc hhe hhf hhh hhm hhr hhs hma hmb hmc hme hmf hmh hmm hmr hms hr- hra hrb hrc hre hrf hrh hrm hrr hrs hsa hsb hsc hse hsf hsh hsm hsr hss m-f m-r maa mab mac mae maf mah mam mar mas mba mbb mbc mbe mbf mbh mbm mbr mbs mc- mca mcb mcc mce mcf mch mcm mcr mcs mea meb mec mee mef meh mem mer mes mfa mfb mfc mfe mff mfh mfm mfr mfs mha mhc mhf mhh mhm mhr mhs mma mmb mmc mme mmf mmh mmm mmr mms mra mrb mrc mre mrf mrh mrm mrr mrs msa msb msc mse msf msh msm msr mss ra- raa rab rac rae raf rah ram rar ras rba rbb rbc rbe rbf rbh rbm rbr rbs rca rcb rcc rce rcf rch rcm rcr rcs re- rea reb rec ree ref reh rem rer res rfa rfb rfc rfe rff rfh rfm rfr rfs rh- rha rhb rhc rhe rhf rhh rhm rhr rhs rma rmb rmc rme rmf rmh rmm rmr rms rra rrb rrc rrf rrh rrm rrr rrs rsa rsb rsc rse rsf rsh rsm rsr rss saa sab sac sae saf sah sam sar sas sba sbb sbc sbe sbf sbh sbm sbr sbs sca scb scc sce scf sch scm scr scs se- sea seb sec see sef seh sem ser ses sfa sfb sfc sfe sff sfh sfm sfr sfs sh- sha shb shc she shf shh shm shr shs sma smb smc sme smf smh smm smr sms sr- sra srb src sre srf srh srm srr srs ss- ssa ssb ssc sse ssf ssh ssm ssr sss