-er -ol c-- ccc ccd cce cck ccl cco ccr ccu ccx cdc cdd cde cdk cdl cdo cdr cdu cdx ce- cec ced cee cek cel ceo cer ceu cex ckc ckd cko ckx cl- clc cld cle clk cll clo clr clu clx co- coc cod coe cok col coo cor cou cox crc crd cre crk crl cro crr cru crx cuc cud cue cuk cul cuo cur cuu cxc cxk cxl cxo cxr cxx dcc dcd dce dck dcl dco dcr dcu dcx ddc ddd dde ddk ddl ddo ddr ddu ddx de- dec ded dee dek del deo der deu dex dkc dke dkk dkl dko dkr dku dkx dl- dlc dld dle dlk dll dlo dlr dlu dlx doc dod doe dok dol doo dor dou dox drc drd dre drk drl dro drr dru drx duc dud due duk dul duo dur dux dxc dxd dxl dxo dxr dxx ec- ecc ecd ece eck ecl eco ecr ecu ecx ed- edc edd ede edk edl edo edr edu edx eec eed eee eek eel eeo eer eex ekc ekd eke ekl eko ekr eku elc eld ele elk ell elo elr elu elx eo- eoc eod eoe eok eol eoo eor eou erc erd ere erk erl ero err eru eu- euc eud eue eul eur eux ex- exc exd exe exl exo exr exu exx kcc kcd kce kck kcl kcr kcu kcx kdc kde kdk kdl kdo kdr kdu kdx ke- kec ked kee kek kel keo ker kex kkc kke kkk kkl kkr kku kl- klc kld klo klr klu klx koc kod koe kok kol koo kor kou krc krd krk krl kro krr kru kuc kud kue kuk kul kur kuu kxl kxo lcc lcd lce lck lcl lco lcr lcu lcx ldc ldd lde ldk ldl ldo ldr ldu lec led lee lek lel leo ler leu lex lkl lkr llc lld lle llk lll llo llr llu loc lod loe lok lol loo lor lou lox lrc lrd lrk lro lrr lru luc lud lue luk lul luo lur luu lux lxc lxd lxo lxr lxx oc- occ ocd ock ocl oco ocr ocu ocx odc odd ode odl odo odr odu oec oed oee oel oeo oer oex okc okd oke okk okl oko okr oku olc old ole olk oll olo olu oo- ooc ood ook ool ooo oor oox or- orc ord ore ork orl oro orr oru orx ou- ouc oud oue ouk oul ouo our ox- oxc oxo oxx rcc rcd rce rcl rco rcr rcu rcx rdc rdd rde rdl rdo rdr rdu rdx re- rec red ree rek rel reo rer reu rex rkc rke rkk rko rku rlc rld rle rll rlo rlr rlu roc rod roe rok rol roo ror rou rox rrc rrd rrk rrl rrr rru ruc rud rue ruk ruo rur ruu rux rxr ucc ucd uce uck ucl uco ucr ucu udc udd ude udk udl udo udr udu udx uec ued uee uel uer ukc uke ukk ukl ukr uku ulc uld ule ulk ull ulo ulr ulu uoc uod uoe uok uol uoo uor uox ur- urc urd ure urk url uro urr uru urx uuc uue uur uuu uxc uxo uxr uxu xcd xcl xcr xcx xdc xde xdk xdr xed xee xel xer xeu xex xke xkl xld xlr xoc xod xok xoo xor xox xrc xrd xrx xue xul xxl xxo xxx