c-- ccc cce ccf ccl ccm ccu ce- cec cee cef cel cem ceu cfc cfe cff cfl cfm cfu cl- clc cle clf cll clm clu cmc cme cmf cml cmm cmu cuc cue cuf cul cum cuu ec- ecc ece ecf ecl ecm ecu eec eee eef eel eem ef- efc efe eff efl efm elc ele elf ell elm elu em- emc eme emf eml emm emu eu- euc eue euf eul fcc fce fcf fcl fcm fcu fec fee fef fel fem feu ffc ffe fff ffl ffm ffu flc fle flf fll flm flu fmc fme fmf fml fmm fmu fue fuf ful fum fuu lcc lce lcf lcl lcm lcu lec lee lef lel lem leu lfc lfe lff lfl lfm lfu llc lle llf lll llm llu lmc lme lmf lml lmm lmu luc lue luf lul lum luu m-f mc- mcc mce mcf mcl mcm mcu mec mee mef mel mem meu mfc mfe mff mfl mfm mfu mlc mle mlf mll mlm mlu mmc mme mmf mml mmm mmu muc mue muf mul mum muu ucc uce ucf ucl ucm ucu uec uee uef uel uem ufc ufe uff ufl ufm ufu ulc ule ulf ull ulm ulu um- umc ume umf uml umm umu uuc uue uum uuu