-er -ey a-a a-b a-i aaa aab aae aag aai aao aar aay ab- aba abb abe abg abi abo abr aby aea aeb aee aeg aei aeo aer aey ag- aga agb age agg agi ago agr agy ai- aia aib aie aig aii aio air aiy aoa aob aoe aog aoi aoo aor ar- ara arb are arg ari aro arr ary ay- aya aye ayi ayo ayr baa bab bae bag bai bao bar bay bba bbb bbe bbg bbi bbo bbr bby be- bea beb bee beg bei beo ber bey bga bgb bge bgg bgi bgo bgr bi- bia bib bie big bii bio bir biy boa bob boe bog boi boo bor boy bra brb bre brg bri bro brr bry by- bya bye byg byi byo byr eaa eab eae eag eai eao ear eba ebb ebe ebg ebi ebo ebr eby eea eeb eee eeg eeo eer eey ega egb ege egg egi ego egr egy eia eib eie eig eii eio eir eo- eoa eob eoe eog eoi eoo eor era erb ere erg eri ero err ery eya eye eyo eyr gaa gab gae gag gai gao gar gay gba gbe gbg gbi gbo gbr gby ge- gea geb gee geg gei geo ger gey gga ggb ggg ggi ggo ggr gia gib gie gig gii gio gir giy goa gob goe gog goi goo gor goy gra grb gre grg gri gro grr gry gy- gya gyb gye gyo gyr ia- iaa iab iae iag iai iao iar iba ibb ibe ibg ibi ibo ibr iby ie- iea iee ieg iei ier iey iga igb ige igg igi igo igr igy iia iib iie iii iio iir io- ioa iob ioe iog ioi ioo ior ir- ira irb ire irg iri iro irr iry iya iye iyo iyr iyy o-i oaa oab oae oag oai oao oar ob- oba obb obe obg obi obo obr oby oea oeb oee oeg oei oeo oer oey oga oge ogg ogi ogo ogy oia oib oie oii oio oir oo- ooa oob oog ooi ooo oor or- ora orb ore org ori oro orr ory oya oye oyi oyo ra- raa rab rae rag rai rao rar ray rba rbb rbe rbg rbi rbo rbr re- rea reb ree reg rei reo rer rey rga rgb rge rgg rgi rgo rgr ria rib rie rig rii rio rir riy roa rob roe rog roi roo ror roy rra rrb rrg rri rrr ry- rya rye ryg ryo ryr ryy yaa yab yae yag yai yao yar yay ybe ybg ybi ybr yby yea yeb yee yeg yei yeo yer yey yga ygo yie yig yii yio yir yob yoe yog yoi yoo yor yoy yra yre yrg yro yyb yye yyg yyy