-er -ey a-a a-c a-t aaa aac aae aao aar aat aax aay ac- aca acc ace aco acr act acx acy aea aec aee aeo aer aet aex aey aoa aoc aoe aoo aor aot aox ar- ara arc are aro arr art arx ary at- ata atc ate ato atr att atx ax- axa axe axo axr axt axx ay- aya ayc aye ayo ayr ayt ayx c-- caa cac cae cao car cat cax cay cca ccc cce cco ccr cct ccx ce- cea cec cee ceo cer cet cex cey co- coa coc coe coo cor cot cox coy cra crc cre cro crr crt crx cry cta ctc cte cto ctr ctt ctx cty cxc cxo cxr cxt cxx cya cyc cye cyo cyr cyt eaa eac eae eao ear eat eax ec- eca ecc ece eco ecr ect ecx eea eec eee eeo eer eet eex eey eo- eoa eoc eoe eoo eor eot era erc ere ero err ert ery eta etc ete eto etr ett etx ety ex- exa exc exe exo exr ext exx exy eya eyc eye eyo eyr eyt oaa oac oae oao oar oat oax oc- oca occ oco ocr oct ocx oea oec oee oeo oer oet oex oey oo- ooa ooc ooo oor oot oox or- ora orc ore oro orr ort orx ory ot- ota otc ote oto otr ott ox- oxa oxc oxo oxt oxx oxy oya oye oyo ra- raa rac rae rao rar rat rax ray rca rcc rce rco rcr rct rcx re- rea rec ree reo rer ret rex rey roa roc roe roo ror rot rox roy rra rrc rrr rrt rta rtc rte rto rtr rtt rtx rty rxr ry- rya ryc rye ryo ryr ryy t-x taa tac tae tao tar tat tax tay tca tcc tce tco tcr tct tcx te- tea tec tee teo ter tet tex tey to- toa toc toe too tor tot tox toy tra trc tre tro trr trt trx try tta ttc tte tto ttr ttt ttx tty txe txt tya tyc tye tyo tyr tyt xaa xac xar xat xcr xcx xee xer xet xex xoa xoc xoo xor xot xox xrc xrt xrx xry xtc xtr xtx xty xxo xxx xxy xyr xyy yaa yac yae yao yar yat yax yay yca ycc yce yco ycy yea yec yee yeo yer yet yex yey yoc yoe yoo yor yot yox yoy yra yrc yre yro yrt yta ytc yte yto ytr ytt yxa yxe yxy yyc yye yyt yyy