-er c-- ccc cce cck ccl ccr ccu ce- cec cee cek cel cer ceu ckc cl- clc cle clk cll clr clu crc cre crk crl crr cru cuc cue cuk cul cur cuu ec- ecc ece eck ecl ecr ecu eec eee eek eel eer ekc eke ekl ekr eku elc ele elk ell elr elu erc ere erk erl err eru eu- euc eue eul eur kcc kce kck kcl kcr kcu ke- kec kee kek kel ker kkc kke kkk kkl kkr kku kl- klc klr klu krc krk krl krr kru kuc kue kuk kul kur kuu lcc lce lck lcl lcr lcu lec lee lek lel ler leu lkl lkr llc lle llk lll llr llu lrc lrk lrr lru luc lue luk lul lur luu rcc rce rcl rcr rcu re- rec ree rek rel rer reu rkc rke rkk rku rlc rle rll rlr rlu rrc rrk rrl rrr rru ruc rue ruk rur ruu ucc uce uck ucl ucr ucu uec uee uel uer ukc uke ukk ukl ukr uku ulc ule ulk ull ulr ulu ur- urc ure urk url urr uru uuc uue uur uuu