-er c-- ccc cce ccl ccr ccu ce- cec cee cel cer ceu cl- clc cle cll clr clu crc cre crl crr cru cuc cue cul cur cuu ec- ecc ece ecl ecr ecu eec eee eel eer elc ele ell elr elu erc ere erl err eru eu- euc eue eul eur lcc lce lcl lcr lcu lec lee lel ler leu llc lle lll llr llu lrc lrr lru luc lue lul lur luu rcc rce rcl rcr rcu re- rec ree rel rer reu rlc rle rll rlr rlu rrc rrl rrr rru ruc rue rur ruu ucc uce ucl ucr ucu uec uee uel uer ulc ule ull ulr ulu ur- urc ure url urr uru uuc uue uur uuu