a-a a-b a-c aaa aab aac aae aah aam aao aas ab- aba abb abc abe abh abm abo abs ac- aca acb acc ace ach acm aco acs aea aeb aec aee aeh aem aeo aes aha ahb ahc ahe ahh ahm aho ahs ama amb amc ame amh amm amo ams aoa aob aoc aoe aoh aom aoo aos as- asa asb asc ase ash asm aso ass baa bab bac bae bah bam bao bas bba bbb bbc bbe bbh bbm bbo bbs bca bcb bcc bce bch bcm bco bcs be- bea beb bec bee beh bem beo bes bha bhb bhc bhe bhh bhm bho bhs bma bmb bmc bme bmh bmm bmo bms boa bob boc boe boh bom boo bos bsa bsb bsc bse bsh bsm bso bss c-- caa cab cac cae cah cam cao cas cba cbb cbc cbe cbh cbm cbo cbs cca ccb ccc cce cch ccm cco ccs ce- cea ceb cec cee ceh cem ceo ces ch- cha chb chc che chh chm cho chs cma cmb cmc cme cmh cmm cmo cms co- coa cob coc coe coh com coo cos csa csb csc cse csh csm cso css eaa eab eac eae eah eam eao eas eba ebb ebc ebe ebh ebm ebo ebs ec- eca ecb ecc ece ech ecm eco ecs eea eeb eec eee eem eeo ees eha ehb ehc ehe ehh ehm eho ehs em- ema emb emc eme emh emm emo ems eo- eoa eob eoc eoe eoh eom eoo eos es- esa esb esc ese esh esm eso ess haa hab hac hae hah ham hao has hba hbb hbc hbe hbh hbm hbo hbs hca hcb hcc hce hch hcm hco hcs he- hea heb hec hee heh hem heo hes hha hhb hhc hhe hhh hhm hho hhs hma hmb hmc hme hmh hmm hmo hms hoa hob hoc hoe hoh hom hoo hos hsa hsb hsc hse hsh hsm hss m-o maa mab mac mae mah mam mao mas mba mbb mbc mbe mbh mbm mbo mbs mc- mca mcb mcc mce mch mcm mco mcs mea meb mec mee meh mem meo mes mha mhc mhh mhm mho mhs mma mmb mmc mme mmh mmm mmo mms moa mob moc moe moh mom moo mos msa msb msc mse msh msm mso mss oaa oab oac oae oah oam oao oas ob- oba obb obc obe obh obm obo obs oc- oca ocb occ och ocm oco ocs oea oeb oec oee oeh oem oeo oes oha ohc ohe ohh ohm oho ohs om- oma omb omc ome omh omm omo oms oo- ooa oob ooc ooh oom ooo oos os- osa osb osc ose osh osm oso oss saa sab sac sae sah sam sao sas sba sbb sbc sbe sbh sbm sbo sbs sca scb scc sce sch scm sco scs se- sea seb sec see seh sem seo ses sh- sha shb shc she shh shm sho shs sma smb smc sme smh smm smo sms soa sob soc soe soh som soo sos ss- ssa ssb ssc sse ssh ssm sso sss