-ey b-p bbb bbe bbi bbo bbp bbs bbt bby be- beb bee bei beo bep bes bet bey bi- bib bie bii bio bip bis bit biy bob boe boi boo bop bos bot boy bpb bpe bpi bpo bpp bps bpt bpy bsb bse bsi bso bsp bss bst bsy btb bte bti bto btp bts btt bty by- bye byi byo byp bys byt ebb ebe ebi ebo ebp ebs ebt eby eeb eee eeo eep ees eet eey eib eie eii eio eip eis eit eo- eob eoe eoi eoo eop eos eot ep- epb epe epi epo epp eps ept es- esb ese esi eso esp ess est esy etb ete eti eto etp ets ett ety eye eyo eyp eys eyt ibb ibe ibi ibo ibp ibs ibt iby ie- iee iei iep ies iet iey iib iie iii iio iip iis iit io- iob ioe ioi ioo iop ios iot ipb ipe ipi ipo ipp ips ipt ipy is- isb ise isi iso isp iss ist isy itb ite iti ito itp its itt ity iye iyo iys iyt iyy o-i ob- obb obe obi obo obp obs obt oby oeb oee oei oeo oep oes oet oey oib oie oii oio oip ois oit oo- oob ooi ooo oop oos oot op- opb ope opi opo opp ops opt opy os- osb ose osi oso osp oss ost ot- otb ote oti oto otp ots ott oye oyi oyo oys p-p pbb pbe pbi pbo pbp pbs pbt pby peb pee pei peo pep pes pet pey pib pie pii pio pip pis pit pob poe poi poo pop pos pot poy ppb ppe ppi ppo ppp pps ppt ps- psb pse psi pso psp pss pst psy pt- ptb pte pti pto ptp pts ptt pty py- pyb pye pyo pys pyt sbb sbe sbi sbo sbp sbs sbt sby se- seb see sei seo sep ses set sey sib sie sii sio sip sis sit sob soe soi soo sop sos sot soy spb spe spi spo spp sps spt spy ss- ssb sse ssi sso ssp sss sst stb ste sti sto stp sts stt sty sy- syb sye syi syp sys syt tbb tbe tbi tbo tbp tbs tbt te- teb tee tei teo tep tes tet tey tib tie tii tio tip tis tit tiy to- tob toe toi too top tos tot toy tpb tpe tpi tpo tpp tps tpt tsb tse tsi tso tsp tss tst tsy ttb tte tti tto ttp tts ttt tty tye tyo typ tys tyt ybe ybi ybp ybs yby yeb yee yei yeo yep yes yet yey yie yii yio yip yis yit yob yoe yoi yoo yop yos yot yoy ypo yps ysb yse ysi yso ysp yss yst ysy yte yto ytp yts ytt yyb yye yys yyt yyy