a-a a-b aaa aab aae aah aam aao aas ab- aba abb abe abh abm abo abs aea aeb aee aeh aem aeo aes aha ahb ahe ahh ahm aho ahs ama amb ame amh amm amo ams aoa aob aoe aoh aom aoo aos as- asa asb ase ash asm aso ass baa bab bae bah bam bao bas bba bbb bbe bbh bbm bbo bbs be- bea beb bee beh bem beo bes bha bhb bhe bhh bhm bho bhs bma bmb bme bmh bmm bmo bms boa bob boe boh bom boo bos bsa bsb bse bsh bsm bso bss eaa eab eae eah eam eao eas eba ebb ebe ebh ebm ebo ebs eea eeb eee eem eeo ees eha ehb ehe ehh ehm eho ehs em- ema emb eme emh emm emo ems eo- eoa eob eoe eoh eom eoo eos es- esa esb ese esh esm eso ess haa hab hae hah ham hao has hba hbb hbe hbh hbm hbo hbs he- hea heb hee heh hem heo hes hha hhb hhe hhh hhm hho hhs hma hmb hme hmh hmm hmo hms hoa hob hoe hoh hom hoo hos hsa hsb hse hsh hsm hss m-o maa mab mae mah mam mao mas mba mbb mbe mbh mbm mbo mbs mea meb mee meh mem meo mes mha mhh mhm mho mhs mma mmb mme mmh mmm mmo mms moa mob moe moh mom moo mos msa msb mse msh msm mso mss oaa oab oae oah oam oao oas ob- oba obb obe obh obm obo obs oea oeb oee oeh oem oeo oes oha ohe ohh ohm oho ohs om- oma omb ome omh omm omo oms oo- ooa oob ooh oom ooo oos os- osa osb ose osh osm oso oss saa sab sae sah sam sao sas sba sbb sbe sbh sbm sbo sbs se- sea seb see seh sem seo ses sh- sha shb she shh shm sho shs sma smb sme smh smm smo sms soa sob soe soh som soo sos ss- ssa ssb sse ssh ssm sso sss