a-a a-b a-c aaa aab aac aad aae aah aam aao ab- aba abb abc abd abe abh abm abo ac- aca acb acc acd ace ach acm aco ad- ada adb adc add ade adh adm ado aea aeb aec aed aee aeh aem aeo aha ahb ahc ahd ahe ahh ahm aho ama amb amc amd ame amh amm amo aoa aob aoc aod aoe aoh aom aoo baa bab bac bad bae bah bam bao bba bbb bbc bbd bbe bbh bbm bbo bca bcb bcc bcd bce bch bcm bco bda bdb bdc bdd bde bdh bdm bdo be- bea beb bec bed bee beh bem beo bha bhb bhc bhd bhe bhh bhm bho bma bmb bmc bmd bme bmh bmm bmo boa bob boc bod boe boh bom boo c-- caa cab cac cad cae cah cam cao cba cbb cbc cbd cbe cbh cbm cbo cca ccb ccc ccd cce cch ccm cco cda cdb cdc cdd cde cdh cdm cdo ce- cea ceb cec ced cee ceh cem ceo ch- cha chb chc chd che chh chm cho cma cmb cmc cmd cme cmh cmm cmo co- coa cob coc cod coe coh com coo daa dab dac dad dae dah dam dao dba dbb dbc dbd dbe dbh dbm dbo dca dcb dcc dcd dce dcm dco dda ddb ddc ddd dde ddh ddm ddo de- dea deb dec ded dee deh dem deo dh- dha dhb dhc dhd dhe dhh dhm dho dma dmb dmc dmd dme dmh dmm dmo doa dob doc dod doe doh dom doo eaa eab eac ead eae eah eam eao eba ebb ebc ebd ebe ebh ebm ebo ec- eca ecb ecc ecd ece ech ecm eco ed- eda edb edc edd ede edh edm edo eea eeb eec eed eee eem eeo eha ehb ehc ehd ehe ehh ehm eho em- ema emb emc emd eme emh emm emo eo- eoa eob eoc eod eoe eoh eom eoo haa hab hac had hae hah ham hao hba hbb hbc hbd hbe hbh hbm hbo hca hcb hcc hcd hce hch hcm hco hda hdb hdc hdd hde hdh hdm hdo he- hea heb hec hed hee heh hem heo hha hhb hhc hhd hhe hhh hhm hho hma hmb hmc hmd hme hmh hmm hmo hoa hob hoc hod hoe hoh hom hoo m-o maa mab mac mad mae mah mam mao mba mbb mbc mbd mbe mbh mbm mbo mc- mca mcb mcc mcd mce mch mcm mco mda mdb mdc mdd mde mdh mdm mdo mea meb mec med mee meh mem meo mha mhc mhd mhh mhm mho mma mmb mmc mmd mme mmh mmm mmo moa mob moc mod moe moh mom moo oaa oab oac oad oae oah oam oao ob- oba obb obc obd obe obh obm obo oc- oca ocb occ ocd och ocm oco oda odb odc odd ode odh odm odo oea oeb oec oed oee oeh oem oeo oha ohc ohd ohe ohh ohm oho om- oma omb omc omd ome omh omm omo oo- ooa oob ooc ood ooh oom ooo