c-- ccc ccd cce ccf ccm ccu cdc cdd cde cdf cdm cdu ce- cec ced cee cef cem ceu cfc cfd cfe cff cfm cfu cmc cmd cme cmf cmm cmu cuc cud cue cuf cum cuu dcc dcd dce dcf dcm dcu ddc ddd dde ddf ddm ddu de- dec ded dee def dem deu dfc dfd dfe dff dfm dfu dmc dmd dme dmf dmm dmu duc dud due duf dum ec- ecc ecd ece ecf ecm ecu ed- edc edd ede edf edm edu eec eed eee eef eem ef- efc efd efe eff efm em- emc emd eme emf emm emu eu- euc eud eue euf fcc fcd fce fcf fcm fcu fdc fdd fde fdf fdm fdu fec fed fee fef fem feu ffc ffd ffe fff ffm ffu fmc fmd fme fmf fmm fmu fud fue fuf fum fuu m-f mc- mcc mcd mce mcf mcm mcu mdc mdd mde mdf mdm mdu mec med mee mef mem meu mfc mfd mfe mff mfm mfu mmc mmd mme mmf mmm mmu muc mud mue muf mum muu ucc ucd uce ucf ucm ucu udc udd ude udf udm udu uec ued uee uef uem ufc ufd ufe uff ufm ufu um- umc umd ume umf umm umu uuc uue uum uuu