-er -ol c-- ccc cce ccl cco ccr ccu ccv ce- cec cee cel ceo cer ceu cev cl- clc cle cll clo clr clu clv co- coc coe col coo cor cou cov crc cre crl cro crr cru crv cuc cue cul cuo cur cuu cuv cvc cve cvl cvo cvr cvu cvv ec- ecc ece ecl eco ecr ecu ecv eec eee eel eeo eer eev elc ele ell elo elr elu elv eo- eoc eoe eol eoo eor eou erc ere erl ero err eru erv eu- euc eue eul eur euv evc eve evl evo evr evv lcc lce lcl lco lcr lcu lcv lec lee lel leo ler leu lev llc lle lll llo llr llu llv loc loe lol loo lor lou lov lrc lro lrr lru lrv luc lue lul luo lur luu luv lvc lve lvl lvr lvv oc- occ ocl oco ocr ocu ocv oec oee oel oeo oer olc ole oll olo olu oo- ooc ool ooo oor oov or- orc ore orl oro orr oru orv ou- ouc oue oul ouo our ov- ovc ove ovl ovo ovv rcc rce rcl rco rcr rcu rcv re- rec ree rel reo rer reu rev rlc rle rll rlo rlr rlu roc roe rol roo ror rou rov rrc rrl rrr rru ruc rue ruo rur ruu ruv rvc rve rvl rvo rvr rvu rvv ucc uce ucl uco ucr ucu ucv uec uee uel uer ulc ule ull ulo ulr ulu ulv uoc uoe uol uoo uor ur- urc ure url uro urr uru uuc uue uur uuu uvc uve uvl uvo uvu uvv v-e vcc vce vcl vco vcr vcu vec vee vel veo ver veu vl- vlc vle vll vlo vlv voc voe vol voo vor vou vov vrc vre vrr vru vue vul vur vuv vvc vvo vvr vvv