-er -ol c-- ccc cce ccl cco ccr ccu ce- cec cee cel ceo cer ceu cl- clc cle cll clo clr clu co- coc coe col coo cor cou crc cre crl cro crr cru cuc cue cul cuo cur cuu ec- ecc ece ecl eco ecr ecu eec eee eel eeo eer elc ele ell elo elr elu eo- eoc eoe eol eoo eor eou erc ere erl ero err eru eu- euc eue eul eur lcc lce lcl lco lcr lcu lec lee lel leo ler leu llc lle lll llo llr llu loc loe lol loo lor lou lrc lro lrr lru luc lue lul luo lur luu oc- occ ocl oco ocr ocu oec oee oel oeo oer olc ole oll olo olu oo- ooc ool ooo oor or- orc ore orl oro orr oru ou- ouc oue oul ouo our rcc rce rcl rco rcr rcu re- rec ree rel reo rer reu rlc rle rll rlo rlr rlu roc roe rol roo ror rou rrc rrl rrr rru ruc rue ruo rur ruu ucc uce ucl uco ucr ucu uec uee uel uer ulc ule ull ulo ulr ulu uoc uoe uol uoo uor ur- urc ure url uro urr uru uuc uue uur uuu