-er c-- ccc cce ccf cck ccl ccr ccu ce- cec cee cef cek cel cer ceu cfc cfe cff cfk cfl cfr cfu ckc cl- clc cle clf clk cll clr clu crc cre crf crk crl crr cru cuc cue cuf cuk cul cur cuu ec- ecc ece ecf eck ecl ecr ecu eec eee eef eek eel eer ef- efc efe eff efl efr ekc eke ekf ekl ekr eku elc ele elf elk ell elr elu erc ere erf erk erl err eru eu- euc eue euf eul eur fcc fce fcf fck fcl fcr fcu fec fee fef fek fel fer feu ffc ffe fff ffk ffl ffr ffu fkc fkf fkk fkl flc fle flf fll flr flu frc fre frf frk frl frr fru fue fuf fuk ful fur fuu kcc kce kck kcl kcr kcu ke- kec kee kef kek kel ker kfc kff kfu kkc kke kkk kkl kkr kku kl- klc klf klr klu krc krf krk krl krr kru kuc kue kuk kul kur kuu lcc lce lcf lck lcl lcr lcu lec lee lef lek lel ler leu lfc lfe lff lfk lfl lfr lfu lkl lkr llc lle llf llk lll llr llu lrc lrf lrk lrr lru luc lue luf luk lul lur luu rcc rce rcf rcl rcr rcu re- rec ree ref rek rel rer reu rfc rfe rff rfk rfl rfr rfu rkc rke rkf rkk rku rlc rle rlf rll rlr rlu rrc rrf rrk rrl rrr rru ruc rue ruf ruk rur ruu ucc uce ucf uck ucl ucr ucu uec uee uef uel uer ufc ufe uff ufl ufr ufu ukc uke ukf ukk ukl ukr uku ulc ule ulf ulk ull ulr ulu ur- urc ure urf urk url urr uru uuc uue uur uuu