-ey b-p bbb bbe bbn bbo bbp bby be- beb bee ben beo bep bey bnb bne bnn bno bnp bob boe bon boo bop boy bpb bpe bpn bpo bpp bpy by- bye byn byo byp ebb ebe ebn ebo ebp eby eeb eee een eeo eep eey en- enb ene enn eno enp eny eo- eob eoe eon eoo eop ep- epb epe epn epo epp eye eyn eyo eyp nbb nbe nbn nbo nbp ne- neb nee nen neo nep ney nnb nne nnn nno nnp no- nob noe non noo nop noy npb npe npn npo npp nye nyn nyo nyp nyy ob- obb obe obn obo obp oby oeb oee oen oeo oep oey on- onb one onn ono onp ony oo- oob oon ooo oop op- opb ope opn opo opp opy oye oyo p-p pbb pbe pbn pbo pbp pby peb pee pen peo pep pey pn- pnb pne pnn pno pnp pny pob poe pon poo pop poy ppb ppe ppn ppo ppp py- pyb pye pyn pyo ybe ybp yby yeb yee yen yeo yep yey yne ynn ynp yny yob yoe yon yoo yop yoy ypo yyb yye yyy