-er -ey c-- ccc cce cco ccr cct ccx ce- cec cee ceo cer cet cex cey co- coc coe coo cor cot cox coy crc cre cro crr crt crx cry ctc cte cto ctr ctt ctx cty cxc cxo cxr cxt cxx cyc cye cyo cyr cyt ec- ecc ece eco ecr ect ecx eec eee eeo eer eet eex eey eo- eoc eoe eoo eor eot erc ere ero err ert ery etc ete eto etr ett etx ety ex- exc exe exo exr ext exx exy eyc eye eyo eyr eyt oc- occ oco ocr oct ocx oec oee oeo oer oet oex oey oo- ooc ooo oor oot oox or- orc ore oro orr ort orx ory ot- otc ote oto otr ott ox- oxc oxo oxt oxx oxy oye oyo rcc rce rco rcr rct rcx re- rec ree reo rer ret rex rey roc roe roo ror rot rox roy rrc rrr rrt rtc rte rto rtr rtt rtx rty rxr ry- ryc rye ryo ryr ryy t-x tcc tce tco tcr tct tcx te- tec tee teo ter tet tex tey to- toc toe too tor tot tox toy trc tre tro trr trt trx try ttc tte tto ttr ttt ttx tty txe txt tyc tye tyo tyr tyt xcr xcx xee xer xet xex xoc xoo xor xot xox xrc xrt xrx xry xtc xtr xtx xty xxo xxx xxy xyr xyy ycc yce yco ycy yec yee yeo yer yet yex yey yoc yoe yoo yor yot yox yoy yrc yre yro yrt ytc yte yto ytr ytt yxe yxy yyc yye yyt yyy