-er -ey a-a a-b aaa aab aae aag aan aao aar aay ab- aba abb abe abg abn abo abr aby aea aeb aee aeg aen aeo aer aey ag- aga agb age agg agn ago agr agy an- ana anb ane ang ann ano anr any aoa aob aoe aog aon aoo aor ar- ara arb are arg arn aro arr ary ay- aya aye ayn ayo ayr baa bab bae bag ban bao bar bay bba bbb bbe bbg bbn bbo bbr bby be- bea beb bee beg ben beo ber bey bga bgb bge bgg bgn bgo bgr bna bnb bne bng bnn bno bnr boa bob boe bog bon boo bor boy bra brb bre brg brn bro brr bry by- bya bye byg byn byo byr eaa eab eae eag ean eao ear eba ebb ebe ebg ebn ebo ebr eby eea eeb eee eeg een eeo eer eey ega egb ege egg egn ego egr egy en- ena enb ene eng enn eno enr eny eo- eoa eob eoe eog eon eoo eor era erb ere erg ern ero err ery eya eye eyn eyo eyr gaa gab gae gag gan gao gar gay gba gbe gbg gbn gbo gbr gby ge- gea geb gee geg gen geo ger gey gga ggb ggg ggn ggo ggr gna gnb gne gnn gno gnr goa gob goe gog gon goo gor goy gra grb gre grg grn gro grr gry gy- gya gyb gye gyn gyo gyr naa nab nae nag nan nao nar nay nba nbb nbe nbg nbn nbo nbr ne- nea neb nee neg nen neo ner ney nga ngb nge ngg ngn ngo nna nnb nne nng nnn nno no- noa nob noe nog non noo nor noy nra nrb nre nrg nrn nro nrr nry nya nye nyg nyn nyo nyy oaa oab oae oag oan oao oar ob- oba obb obe obg obn obo obr oby oea oeb oee oeg oen oeo oer oey oga oge ogg ogn ogo ogy on- ona onb one ong onn ono onr ony oo- ooa oob oog oon ooo oor or- ora orb ore org orn oro orr ory oya oye oyo ra- raa rab rae rag ran rao rar ray rba rbb rbe rbg rbn rbo rbr re- rea reb ree reg ren reo rer rey rga rgb rge rgg rgn rgo rgr rna rnb rng rnn rno rnr rny roa rob roe rog ron roo ror roy rra rrb rrg rrn rrr ry- rya rye ryg ryn ryo ryr ryy yaa yab yae yag yan yao yar yay ybe ybg ybr yby yea yeb yee yeg yen yeo yer yey yga ygo yna yne yng ynn yny yob yoe yog yon yoo yor yoy yra yre yrg yrn yro yyb yye yyg yyy