c-- ccc ccd ccf ccm ccu cdc cdd cdf cdm cdu cfc cfd cff cfm cfu cmc cmd cmf cmm cmu cuc cud cuf cum cuu dcc dcd dcf dcm dcu ddc ddd ddf ddm ddu dfc dfd dff dfm dfu dmc dmd dmf dmm dmu duc dud duf dum fcc fcd fcf fcm fcu fdc fdd fdf fdm fdu ffc ffd fff ffm ffu fmc fmd fmf fmm fmu fud fuf fum fuu m-f mc- mcc mcd mcf mcm mcu mdc mdd mdf mdm mdu mfc mfd mff mfm mfu mmc mmd mmf mmm mmu muc mud muf mum muu ucc ucd ucf ucm ucu udc udd udf udm udu ufc ufd uff ufm ufu um- umc umd umf umm umu uuc uum uuu