-er a-a a-b a-c aaa aab aac aae aaj aak aam aar aas ab- aba abb abc abe abj abk abm abr abs ac- aca acb acc ace acj ack acm acr acs aea aeb aec aee aej aek aem aer aes aja ajb ajc aje ajj ajk ajm ajr ajs aka akb akc ake akj akk akm akr aks ama amb amc ame amk amm amr ams ar- ara arb arc are arj ark arm arr ars as- asa asb asc ase asj ask asm asr ass baa bab bac bae baj bak bam bar bas bba bbb bbc bbe bbk bbm bbr bbs bca bcb bcc bce bcj bck bcm bcr bcs be- bea beb bec bee bek bem ber bes bja bjc bjj bjk bjm bjr bjs bka bkb bkc bke bkk bkm bkr bks bma bmb bmc bme bmj bmk bmm bmr bms bra brb bre brj brk brm brr brs bsa bsb bsc bse bsj bsk bsm bsr bss c-- c-j caa cab cac cae caj cak cam car cas cba cbb cbc cbe cbj cbk cbm cbr cbs cca ccb ccc cce ccj cck ccm ccr ccs ce- cea ceb cec cee cej cek cem cer ces cja cjb cjc cjk cjr cjs cka ckb ckc ckm cks cma cmb cmc cme cmj cmk cmm cmr cms cra crb crc cre crj crk crm crr crs csa csb csc cse csj csk csm csr css eaa eab eac eae eaj eak eam ear eas eba ebb ebc ebe ebj ebk ebm ebr ebs ec- eca ecb ecc ece ecj eck ecm ecr ecs eea eeb eec eee eek eem eer ees eja ejc eka ekb ekc eke ekr eks em- ema emb emc eme emk emm emr ems era erb erc ere erk erm err ers es- esa esb esc ese esk esm esr ess jaa jab jac jae jaj jak jam jar jas jba jbc jbj jbk jbm jbr jbs jca jcb jcc jce jck jcm jcr jcs jea jeb jec jee jej jek jem jer jes jja jjb jjc jjj jjk jjr jjs jka jkb jkk jkm jkr jks jma jmb jmc jme jmj jmm jmr jms jra jrb jrc jrk jrm jrr jrs jsa jsb jsc jse jsj jsk jsm jsr jss ka- kaa kab kac kae kaj kak kam kar kas kba kbb kbc kbe kbk kbm kbr kbs kca kcb kcc kce kck kcm kcr kcs ke- kea keb kec kee kek kem ker kes kjb kjc kje kjr kjs kkb kkc kke kkk kkm kkr kks kma kmb kmc kme kmj kmk kmm kms kra krc krk krr krs ksa ksb ksc kse ksk ksm ksr kss m-r maa mab mac mae maj mak mam mar mas mba mbb mbc mbe mbj mbk mbm mbr mbs mc- mca mcb mcc mce mck mcm mcr mcs mea meb mec mee mej mek mem mer mes mjb mjc mje mjj mjk mjm mjr mjs mka mkb mkc mke mkk mkm mkr mks mma mmb mmc mme mmj mmk mmm mmr mms mra mrb mrc mre mrj mrk mrm mrr mrs msa msb msc mse msj msk msm msr mss ra- raa rab rac rae raj rak ram rar ras rba rbb rbc rbe rbk rbm rbr rbs rca rcb rcc rce rcj rcm rcr rcs re- rea reb rec ree rek rem rer res rja rjc rjk rjm rjr rkb rkc rke rkk rkm rks rma rmb rmc rme rmm rmr rms rra rrb rrc rrk rrm rrr rrs rsa rsb rsc rse rsj rsk rsm rsr rss saa sab sac sae saj sak sam sar sas sba sbb sbc sbe sbj sbk sbm sbr sbs sca scb scc sce scj sck scm scr scs se- sea seb sec see sej sek sem ser ses sja sjb sjc sje sjj sjk sjm sjr sjs sk- ska skb skc ske skj skk skm skr sks sma smb smc sme smk smm smr sms sr- sra srb src sre srj srk srm srr srs ss- ssa ssb ssc sse ssj ssk ssm ssr sss