-er -ey c-- ccc cce cco ccr cct ccu ccx ce- cec cee ceo cer cet ceu cex cey co- coc coe coo cor cot cou cox coy crc cre cro crr crt cru crx cry ctc cte cto ctr ctt ctu ctx cty cuc cue cuo cur cut cuu cuy cxc cxo cxr cxt cxx cyc cye cyo cyr cyt ec- ecc ece eco ecr ect ecu ecx eec eee eeo eer eet eex eey eo- eoc eoe eoo eor eot eou erc ere ero err ert eru ery etc ete eto etr ett etu etx ety eu- euc eue eur eut eux ex- exc exe exo exr ext exu exx exy eyc eye eyo eyr eyt oc- occ oco ocr oct ocu ocx oec oee oeo oer oet oex oey oo- ooc ooo oor oot oox or- orc ore oro orr ort oru orx ory ot- otc ote oto otr ott otu ou- ouc oue ouo our out ox- oxc oxo oxt oxx oxy oye oyo rcc rce rco rcr rct rcu rcx re- rec ree reo rer ret reu rex rey roc roe roo ror rot rou rox roy rrc rrr rrt rru rtc rte rto rtr rtt rtu rtx rty ruc rue ruo rur rut ruu rux ruy rxr ry- ryc rye ryo ryr ryu ryy t-x tcc tce tco tcr tct tcu tcx te- tec tee teo ter tet teu tex tey to- toc toe too tor tot tou tox toy trc tre tro trr trt tru trx try ttc tte tto ttr ttt ttu ttx tty tuc tue tuo tur tut tuu tux tuy txe txt txu tyc tye tyo tyr tyt ucc uce uco ucr uct ucu uec uee uer uet uey uoc uoe uoo uor uot uox ur- urc ure uro urr urt uru urx ury utc ute uto utr utt utu utx uty uuc uue uur uut uuu uxc uxo uxr uxt uxu uyc uyo uyu xcr xcx xee xer xet xeu xex xoc xoo xor xot xox xrc xrt xrx xry xtc xtr xtx xty xue xxo xxx xxy xyr xyy ycc yce yco ycu ycy yec yee yeo yer yet yex yey yoc yoe yoo yor yot you yox yoy yrc yre yro yrt yru ytc yte yto ytr ytt ytu yue yuo yur yut yuu yux yuy yxe yxy yyc yye yyt yyu yyy