-ey b-p bbb bbe bbi bbo bbp bbs bby be- beb bee bei beo bep bes bey bi- bib bie bii bio bip bis biy bob boe boi boo bop bos boy bpb bpe bpi bpo bpp bps bpy bsb bse bsi bso bsp bss bsy by- bye byi byo byp bys ebb ebe ebi ebo ebp ebs eby eeb eee eeo eep ees eey eib eie eii eio eip eis eo- eob eoe eoi eoo eop eos ep- epb epe epi epo epp eps es- esb ese esi eso esp ess esy eye eyo eyp eys ibb ibe ibi ibo ibp ibs iby ie- iee iei iep ies iey iib iie iii iio iip iis io- iob ioe ioi ioo iop ios ipb ipe ipi ipo ipp ips ipy is- isb ise isi iso isp iss isy iye iyo iys iyy o-i ob- obb obe obi obo obp obs oby oeb oee oei oeo oep oes oey oib oie oii oio oip ois oo- oob ooi ooo oop oos op- opb ope opi opo opp ops opy os- osb ose osi oso osp oss oye oyi oyo oys p-p pbb pbe pbi pbo pbp pbs pby peb pee pei peo pep pes pey pib pie pii pio pip pis pob poe poi poo pop pos poy ppb ppe ppi ppo ppp pps ps- psb pse psi pso psp pss psy py- pyb pye pyo pys sbb sbe sbi sbo sbp sbs sby se- seb see sei seo sep ses sey sib sie sii sio sip sis sob soe soi soo sop sos soy spb spe spi spo spp sps spy ss- ssb sse ssi sso ssp sss sy- syb sye syi syp sys ybe ybi ybp ybs yby yeb yee yei yeo yep yes yey yie yii yio yip yis yob yoe yoi yoo yop yos yoy ypo yps ysb yse ysi yso ysp yss ysy yyb yye yys yyy