-er -ey a-a a-b a-i aaa aab aad aae aai aao aar aay ab- aba abb abd abe abi abo abr aby ad- ada adb add ade adi ado adr ady aea aeb aed aee aei aeo aer aey ai- aia aib aid aie aii aio air aiy aoa aob aod aoe aoi aoo aor ar- ara arb ard are ari aro arr ary ay- aya ayd aye ayi ayo ayr baa bab bad bae bai bao bar bay bba bbb bbd bbe bbi bbo bbr bby bda bdb bdd bde bdi bdo bdr bdy be- bea beb bed bee bei beo ber bey bi- bia bib bid bie bii bio bir biy boa bob bod boe boi boo bor boy bra brb brd bre bri bro brr bry by- bya byd bye byi byo byr daa dab dad dae dai dao dar day dba dbb dbd dbe dbi dbo dbr dby dda ddb ddd dde ddi ddo ddr ddy de- dea deb ded dee dei deo der dey di- dia dib did die dii dio dir diy doa dob dod doe doi doo dor doy dra drb drd dre dri dro drr dry dy- dya dyb dyd dye dyo dyr dyy eaa eab ead eae eai eao ear eba ebb ebd ebe ebi ebo ebr eby ed- eda edb edd ede edi edo edr edy eea eeb eed eee eeo eer eey eia eib eid eie eii eio eir eo- eoa eob eod eoe eoi eoo eor era erb erd ere eri ero err ery eya eyd eye eyo eyr i-d ia- iaa iab iad iae iai iao iar iba ibb ibd ibe ibi ibo ibr iby ida idb idd ide idi ido idr idy ie- iea ied iee iei ier iey iia iib iid iie iii iio iir io- ioa iob iod ioe ioi ioo ior ir- ira irb ird ire iri iro irr iry iya iye iyo iyr iyy o-i oaa oab oad oae oai oao oar ob- oba obb obd obe obi obo obr oby oda odb odd ode odi odo odr oea oeb oed oee oei oeo oer oey oia oib oid oie oii oio oir oo- ooa oob ood ooi ooo oor or- ora orb ord ore ori oro orr ory oya oyd oye oyi oyo ra- raa rab rad rae rai rao rar ray rba rbb rbd rbe rbi rbo rbr rda rdb rdd rde rdi rdo rdr rdy re- rea reb red ree rei reo rer rey ria rib rid rie rii rio rir riy roa rob rod roe roi roo ror roy rra rrb rrd rri rrr ry- rya ryd rye ryo ryr ryy yaa yab yad yae yai yao yar yay ybe ybi ybr yby yda yde ydo ydy yea yeb yed yee yei yeo yer yey yid yie yii yio yir yob yod yoe yoi yoo yor yoy yra yre yro yyb yye yyy