-er -ey a-a a-b a-t aaa aab aae aan aao aar aat aay ab- aba abb abe abn abo abr abt aby aea aeb aee aen aeo aer aet aey an- ana anb ane ann ano anr ant any aoa aob aoe aon aoo aor aot ar- ara arb are arn aro arr art ary at- ata atb ate atn ato atr att ay- aya aye ayn ayo ayr ayt baa bab bae ban bao bar bat bay bba bbb bbe bbn bbo bbr bbt bby be- bea beb bee ben beo ber bet bey bna bnb bne bnn bno bnr bnt boa bob boe bon boo bor bot boy bra brb bre brn bro brr brt bry bta btb bte btn bto btr btt bty by- bya bye byn byo byr byt eaa eab eae ean eao ear eat eba ebb ebe ebn ebo ebr ebt eby eea eeb eee een eeo eer eet eey en- ena enb ene enn eno enr ent eny eo- eoa eob eoe eon eoo eor eot era erb ere ern ero err ert ery eta etb ete etn eto etr ett ety eya eye eyn eyo eyr eyt naa nab nae nan nao nar nat nay nba nbb nbe nbn nbo nbr nbt ne- nea neb nee nen neo ner net ney nna nnb nne nnn nno nnt no- noa nob noe non noo nor not noy nra nrb nre nrn nro nrr nrt nry nta ntb nte ntn nto ntr ntt nya nye nyn nyo nyt nyy oaa oab oae oan oao oar oat ob- oba obb obe obn obo obr obt oby oea oeb oee oen oeo oer oet oey on- ona onb one onn ono onr ont ony oo- ooa oob oon ooo oor oot or- ora orb ore orn oro orr ort ory ot- ota otb ote otn oto otr ott oya oye oyo ra- raa rab rae ran rao rar rat ray rba rbb rbe rbn rbo rbr rbt re- rea reb ree ren reo rer ret rey rna rnb rnn rno rnr rnt rny roa rob roe ron roo ror rot roy rra rrb rrn rrr rrt rta rtb rte rtn rto rtr rtt rty ry- rya rye ryn ryo ryr ryy taa tab tae tan tao tar tat tay tba tbb tbe tbn tbo tbr tbt te- tea teb tee ten teo ter tet tey tna tnb tne tnn tno tnr tnt to- toa tob toe ton too tor tot toy tra trb tre trn tro trr trt try tta ttb tte ttn tto ttr ttt tty tya tye tyn tyo tyr tyt yaa yab yae yan yao yar yat yay ybe ybr yby yea yeb yee yen yeo yer yet yey yna yne ynn yny yob yoe yon yoo yor yot yoy yra yre yrn yro yrt yta yte ytn yto ytr ytt yyb yye yyt yyy