-er c-- ccc cce ccf cck ccm ccr ccu ce- cec cee cef cek cem cer ceu cfc cfe cff cfk cfm cfr cfu ckc ckm cmc cme cmf cmk cmm cmr cmu crc cre crf crk crm crr cru cuc cue cuf cuk cum cur cuu ec- ecc ece ecf eck ecm ecr ecu eec eee eef eek eem eer ef- efc efe eff efm efr ekc eke ekf ekr eku em- emc eme emf emk emm emr emu erc ere erf erk erm err eru eu- euc eue euf eur fcc fce fcf fck fcm fcr fcu fec fee fef fek fem fer feu ffc ffe fff ffk ffm ffr ffu fkc fkf fkk fkm fmc fme fmf fmm fmr fmu frc fre frf frk frm frr fru fue fuf fuk fum fur fuu kcc kce kck kcm kcr kcu ke- kec kee kef kek kem ker kfc kff kfm kfu kkc kke kkk kkm kkr kku kmc kme kmf kmk kmm kmu krc krf krk krr kru kuc kue kuk kum kur kuu m-f m-r mc- mcc mce mcf mck mcm mcr mcu mec mee mef mek mem mer meu mfc mfe mff mfm mfr mfu mkc mke mkk mkm mkr mku mmc mme mmf mmk mmm mmr mmu mrc mre mrf mrk mrm mrr mru muc mue muf muk mum mur muu rcc rce rcf rcm rcr rcu re- rec ree ref rek rem rer reu rfc rfe rff rfk rfm rfr rfu rkc rke rkf rkk rkm rku rmc rme rmf rmm rmr rrc rrf rrk rrm rrr rru ruc rue ruf ruk rum rur ruu ucc uce ucf uck ucm ucr ucu uec uee uef uem uer ufc ufe uff ufm ufr ufu ukc uke ukf ukk ukr uku um- umc ume umf umm umr umu ur- urc ure urf urk urm urr uru uuc uue uum uur uuu