-er -ey c-- ccc cce cco ccr ccu ccx ce- cec cee ceo cer ceu cex cey co- coc coe coo cor cou cox coy crc cre cro crr cru crx cry cuc cue cuo cur cuu cuy cxc cxo cxr cxx cyc cye cyo cyr ec- ecc ece eco ecr ecu ecx eec eee eeo eer eex eey eo- eoc eoe eoo eor eou erc ere ero err eru ery eu- euc eue eur eux ex- exc exe exo exr exu exx exy eyc eye eyo eyr oc- occ oco ocr ocu ocx oec oee oeo oer oex oey oo- ooc ooo oor oox or- orc ore oro orr oru orx ory ou- ouc oue ouo our ox- oxc oxo oxx oxy oye oyo rcc rce rco rcr rcu rcx re- rec ree reo rer reu rex rey roc roe roo ror rou rox roy rrc rrr rru ruc rue ruo rur ruu rux ruy rxr ry- ryc rye ryo ryr ryu ryy ucc uce uco ucr ucu uec uee uer uey uoc uoe uoo uor uox ur- urc ure uro urr uru urx ury uuc uue uur uuu uxc uxo uxr uxu uyc uyo uyu xcr xcx xee xer xeu xex xoc xoo xor xox xrc xrx xry xue xxo xxx xxy xyr xyy ycc yce yco ycu ycy yec yee yeo yer yex yey yoc yoe yoo yor you yox yoy yrc yre yro yru yue yuo yur yuu yux yuy yxe yxy yyc yye yyu yyy