-ey a-a a-b a-i aaa aab aae aai aao aas aay ab- aba abb abe abi abo abs aby aea aeb aee aei aeo aes aey ai- aia aib aie aii aio ais aiy aoa aob aoe aoi aoo aos as- asa asb ase asi aso ass asy ay- aya aye ayi ayo ays baa bab bae bai bao bas bay bba bbb bbe bbi bbo bbs bby be- bea beb bee bei beo bes bey bi- bia bib bie bii bio bis biy boa bob boe boi boo bos boy bsa bsb bse bsi bso bss bsy by- bya bye byi byo bys eaa eab eae eai eao eas eba ebb ebe ebi ebo ebs eby eea eeb eee eeo ees eey eia eib eie eii eio eis eo- eoa eob eoe eoi eoo eos es- esa esb ese esi eso ess esy eya eye eyo eys ia- iaa iab iae iai iao ias iba ibb ibe ibi ibo ibs iby ie- iea iee iei ies iey iia iib iie iii iio iis io- ioa iob ioe ioi ioo ios is- isa isb ise isi iso iss isy iya iye iyo iys iyy o-i oaa oab oae oai oao oas ob- oba obb obe obi obo obs oby oea oeb oee oei oeo oes oey oia oib oie oii oio ois oo- ooa oob ooi ooo oos os- osa osb ose osi oso oss oya oye oyi oyo oys saa sab sae sai sao sas say sba sbb sbe sbi sbo sbs sby se- sea seb see sei seo ses sey sia sib sie sii sio sis soa sob soe soi soo sos soy ss- ssa ssb sse ssi sso sss sy- sya syb sye syi sys yaa yab yae yai yao yas yay ybe ybi ybs yby yea yeb yee yei yeo yes yey yie yii yio yis yob yoe yoi yoo yos yoy ysa ysb yse ysi yso yss ysy yyb yye yys yyy