-er a-a a-b a-c aaa aab aac aae aaj aam aar aas ab- aba abb abc abe abj abm abr abs ac- aca acb acc ace acj acm acr acs aea aeb aec aee aej aem aer aes aja ajb ajc aje ajj ajm ajr ajs ama amb amc ame amm amr ams ar- ara arb arc are arj arm arr ars as- asa asb asc ase asj asm asr ass baa bab bac bae baj bam bar bas bba bbb bbc bbe bbm bbr bbs bca bcb bcc bce bcj bcm bcr bcs be- bea beb bec bee bem ber bes bja bjc bjj bjm bjr bjs bma bmb bmc bme bmj bmm bmr bms bra brb bre brj brm brr brs bsa bsb bsc bse bsj bsm bsr bss c-- c-j caa cab cac cae caj cam car cas cba cbb cbc cbe cbj cbm cbr cbs cca ccb ccc cce ccj ccm ccr ccs ce- cea ceb cec cee cej cem cer ces cja cjb cjc cjr cjs cma cmb cmc cme cmj cmm cmr cms cra crb crc cre crj crm crr crs csa csb csc cse csj csm csr css eaa eab eac eae eaj eam ear eas eba ebb ebc ebe ebj ebm ebr ebs ec- eca ecb ecc ece ecj ecm ecr ecs eea eeb eec eee eem eer ees eja ejc em- ema emb emc eme emm emr ems era erb erc ere erm err ers es- esa esb esc ese esm esr ess jaa jab jac jae jaj jam jar jas jba jbc jbj jbm jbr jbs jca jcb jcc jce jcm jcr jcs jea jeb jec jee jej jem jer jes jja jjb jjc jjj jjr jjs jma jmb jmc jme jmj jmm jmr jms jra jrb jrc jrm jrr jrs jsa jsb jsc jse jsj jsm jsr jss m-r maa mab mac mae maj mam mar mas mba mbb mbc mbe mbj mbm mbr mbs mc- mca mcb mcc mce mcm mcr mcs mea meb mec mee mej mem mer mes mjb mjc mje mjj mjm mjr mjs mma mmb mmc mme mmj mmm mmr mms mra mrb mrc mre mrj mrm mrr mrs msa msb msc mse msj msm msr mss ra- raa rab rac rae raj ram rar ras rba rbb rbc rbe rbm rbr rbs rca rcb rcc rce rcj rcm rcr rcs re- rea reb rec ree rem rer res rja rjc rjm rjr rma rmb rmc rme rmm rmr rms rra rrb rrc rrm rrr rrs rsa rsb rsc rse rsj rsm rsr rss saa sab sac sae saj sam sar sas sba sbb sbc sbe sbj sbm sbr sbs sca scb scc sce scj scm scr scs se- sea seb sec see sej sem ser ses sja sjb sjc sje sjj sjm sjr sjs sma smb smc sme smm smr sms sr- sra srb src sre srj srm srr srs ss- ssa ssb ssc sse ssj ssm ssr sss