-ey a-a a-b aaa aab aae aan aao aas aay ab- aba abb abe abn abo abs aby aea aeb aee aen aeo aes aey an- ana anb ane ann ano ans any aoa aob aoe aon aoo aos as- asa asb ase asn aso ass asy ay- aya aye ayn ayo ays baa bab bae ban bao bas bay bba bbb bbe bbn bbo bbs bby be- bea beb bee ben beo bes bey bna bnb bne bnn bno bns boa bob boe bon boo bos boy bsa bsb bse bsn bso bss bsy by- bya bye byn byo bys eaa eab eae ean eao eas eba ebb ebe ebn ebo ebs eby eea eeb eee een eeo ees eey en- ena enb ene enn eno ens eny eo- eoa eob eoe eon eoo eos es- esa esb ese esn eso ess esy eya eye eyn eyo eys naa nab nae nan nao nas nay nba nbb nbe nbn nbo nbs ne- nea neb nee nen neo nes ney nna nnb nne nnn nno nns no- noa nob noe non noo nos noy nsa nsb nse nsn nso nss nsy nya nye nyn nyo nys nyy oaa oab oae oan oao oas ob- oba obb obe obn obo obs oby oea oeb oee oen oeo oes oey on- ona onb one onn ono ons ony oo- ooa oob oon ooo oos os- osa osb ose osn oso oss oya oye oyo oys saa sab sae san sao sas say sba sbb sbe sbn sbo sbs sby se- sea seb see sen seo ses sey sna snb sne snn sno sns sny soa sob soe son soo sos soy ss- ssa ssb sse ssn sso sss sy- sya syb sye syn sys yaa yab yae yan yao yas yay ybe ybs yby yea yeb yee yen yeo yes yey yna yne ynn yns yny yob yoe yon yoo yos yoy ysa ysb yse yso yss ysy yyb yye yys yyy