-er -ol c-- ccc ccd cce ccl cco ccr ccu ccv cdc cdd cde cdl cdo cdr cdu cdv ce- cec ced cee cel ceo cer ceu cev cl- clc cld cle cll clo clr clu clv co- coc cod coe col coo cor cou cov crc crd cre crl cro crr cru crv cuc cud cue cul cuo cur cuu cuv cvc cvd cve cvl cvo cvr cvu cvv dcc dcd dce dcl dco dcr dcu dcv ddc ddd dde ddl ddo ddr ddu de- dec ded dee del deo der deu dev dl- dlc dld dle dll dlo dlr dlu dlv doc dod doe dol doo dor dou dov drc drd dre drl dro drr dru drv duc dud due dul duo dur duv dvc dvd dve dvl dvr dvu ec- ecc ecd ece ecl eco ecr ecu ecv ed- edc edd ede edl edo edr edu eec eed eee eel eeo eer eev elc eld ele ell elo elr elu elv eo- eoc eod eoe eol eoo eor eou erc erd ere erl ero err eru erv eu- euc eud eue eul eur euv evc evd eve evl evo evr evv lcc lcd lce lcl lco lcr lcu lcv ldc ldd lde ldl ldo ldr ldu ldv lec led lee lel leo ler leu lev llc lld lle lll llo llr llu llv loc lod loe lol loo lor lou lov lrc lrd lro lrr lru lrv luc lud lue lul luo lur luu luv lvc lvd lve lvl lvr lvv oc- occ ocd ocl oco ocr ocu ocv odc odd ode odl odo odr odu odv oec oed oee oel oeo oer olc old ole oll olo olu oo- ooc ood ool ooo oor oov or- orc ord ore orl oro orr oru orv ou- ouc oud oue oul ouo our ov- ovc ovd ove ovl ovo ovv rcc rcd rce rcl rco rcr rcu rcv rdc rdd rde rdl rdo rdr rdu rdv re- rec red ree rel reo rer reu rev rlc rld rle rll rlo rlr rlu roc rod roe rol roo ror rou rov rrc rrd rrl rrr rru ruc rud rue ruo rur ruu ruv rvc rvd rve rvl rvo rvr rvu rvv ucc ucd uce ucl uco ucr ucu ucv udc udd ude udl udo udr udu udv uec ued uee uel uer ulc uld ule ull ulo ulr ulu ulv uoc uod uoe uol uoo uor ur- urc urd ure url uro urr uru uuc uue uur uuu uvc uve uvl uvo uvu uvv v-e vcc vcd vce vcl vco vcr vcu vdc vdd vde vdl vdo vdr vdu vdv vec ved vee vel veo ver veu vl- vlc vld vle vll vlo vlv voc vod voe vol voo vor vou vov vrc vrd vre vrr vru vue vul vur vuv vvc vvo vvr vvv