a-a a-b a-c aaa aab aac aae aah aam aas ab- aba abb abc abe abh abm abs ac- aca acb acc ace ach acm acs aea aeb aec aee aeh aem aes aha ahb ahc ahe ahh ahm ahs ama amb amc ame amh amm ams as- asa asb asc ase ash asm ass baa bab bac bae bah bam bas bba bbb bbc bbe bbh bbm bbs bca bcb bcc bce bch bcm bcs be- bea beb bec bee beh bem bes bha bhb bhc bhe bhh bhm bhs bma bmb bmc bme bmh bmm bms bsa bsb bsc bse bsh bsm bss c-- caa cab cac cae cah cam cas cba cbb cbc cbe cbh cbm cbs cca ccb ccc cce cch ccm ccs ce- cea ceb cec cee ceh cem ces ch- cha chb chc che chh chm chs cma cmb cmc cme cmh cmm cms csa csb csc cse csh csm css eaa eab eac eae eah eam eas eba ebb ebc ebe ebh ebm ebs ec- eca ecb ecc ece ech ecm ecs eea eeb eec eee eem ees eha ehb ehc ehe ehh ehm ehs em- ema emb emc eme emh emm ems es- esa esb esc ese esh esm ess haa hab hac hae hah ham has hba hbb hbc hbe hbh hbm hbs hca hcb hcc hce hch hcm hcs he- hea heb hec hee heh hem hes hha hhb hhc hhe hhh hhm hhs hma hmb hmc hme hmh hmm hms hsa hsb hsc hse hsh hsm hss maa mab mac mae mah mam mas mba mbb mbc mbe mbh mbm mbs mc- mca mcb mcc mce mch mcm mcs mea meb mec mee meh mem mes mha mhc mhh mhm mhs mma mmb mmc mme mmh mmm mms msa msb msc mse msh msm mss saa sab sac sae sah sam sas sba sbb sbc sbe sbh sbm sbs sca scb scc sce sch scm scs se- sea seb sec see seh sem ses sh- sha shb shc she shh shm shs sma smb smc sme smh smm sms ss- ssa ssb ssc sse ssh ssm sss