-er c-- ccc cce ccn cco ccr ccu ccv ce- cec cee cen ceo cer ceu cev cn- cnc cne cnn cno cnr cnu cnv co- coc coe con coo cor cou cov crc cre crn cro crr cru crv cuc cue cun cuo cur cuu cuv cvc cve cvn cvo cvr cvu cvv ec- ecc ece ecn eco ecr ecu ecv eec eee een eeo eer eev en- enc ene enn eno enr enu env eo- eoc eoe eon eoo eor eou erc ere ern ero err eru erv eu- euc eue eun eur euv evc eve evn evo evr evv ncc nce ncn nco ncr ncu ncv ne- nec nee nen neo ner neu nev nnc nne nnn nno nnu nnv no- noc noe non noo nor nou nov nrc nre nrn nro nrr nru nrv nuc nue nun nuo nur nuu nuv nvc nve nvn nvu nvv oc- occ ocn oco ocr ocu ocv oec oee oen oeo oer on- onc one onn ono onr onu oo- ooc oon ooo oor oov or- orc ore orn oro orr oru orv ou- ouc oue oun ouo our ov- ovc ove ovo ovv rcc rce rcn rco rcr rcu rcv re- rec ree ren reo rer reu rev rnc rnn rno rnr rnu rnv roc roe ron roo ror rou rov rrc rrn rrr rru ruc rue run ruo rur ruu ruv rvc rve rvn rvo rvr rvu rvv ucc uce ucn uco ucr ucu ucv uec uee uen uer un- unc une unn uno unr unu unv uoc uoe uon uoo uor ur- urc ure urn uro urr uru uuc uue uun uur uuu uvc uve uvo uvu uvv v-e vcc vce vcn vco vcr vcu vec vee ven veo ver veu vn- vno vnr vnu vnv voc voe von voo vor vou vov vrc vre vrn vrr vru vue vur vuv vvc vvo vvr vvv