a-a a-c aaa aac aad aae aaf aam aao ac- aca acc acd ace acf acm aco ad- ada adc add ade adf adm ado aea aec aed aee aef aem aeo af- afa afc afd afe aff afm afo ama amc amd ame amf amm amo aoa aoc aod aoe aof aom aoo c-- caa cac cad cae caf cam cao cca ccc ccd cce ccf ccm cco cda cdc cdd cde cdf cdm cdo ce- cea cec ced cee cef cem ceo cfa cfc cfd cfe cff cfm cfo cma cmc cmd cme cmf cmm cmo co- coa coc cod coe cof com coo daa dac dad dae daf dam dao dca dcc dcd dce dcf dcm dco dda ddc ddd dde ddf ddm ddo de- dea dec ded dee def dem deo dfa dfc dfd dfe dff dfm dfo dma dmc dmd dme dmf dmm dmo doa doc dod doe dof dom doo eaa eac ead eae eaf eam eao ec- eca ecc ecd ece ecf ecm eco ed- eda edc edd ede edf edm edo eea eec eed eee eef eem eeo ef- efa efc efd efe eff efm efo em- ema emc emd eme emf emm emo eo- eoa eoc eod eoe eof eom eoo faa fac fad fae faf fam fao fca fcc fcd fce fcf fcm fco fda fdc fdd fde fdf fdm fdo fea fec fed fee fef fem feo ffa ffc ffd ffe fff ffm ffo fma fmc fmd fme fmf fmm fmo foa foc foe fof fom foo m-f m-o maa mac mad mae maf mam mao mc- mca mcc mcd mce mcf mcm mco mda mdc mdd mde mdf mdm mdo mea mec med mee mef mem meo mfa mfc mfd mfe mff mfm mfo mma mmc mmd mme mmf mmm mmo moa moc mod moe mof mom moo oaa oac oad oae oaf oam oao oc- oca occ ocd ocf ocm oco oda odc odd ode odf odm odo oea oec oed oee oef oem oeo of- ofa ofc ofd ofe off ofm ofo om- oma omc omd ome omf omm omo oo- ooa ooc ood oof oom ooo