-ey b-p bbb bbe bbo bbp bbx bby be- beb bee beo bep bex bey bob boe boo bop box boy bpb bpe bpo bpp bpx bpy bxb bxo bxx by- bye byo byp ebb ebe ebo ebp ebx eby eeb eee eeo eep eex eey eo- eob eoe eoo eop ep- epb epe epo epp epx ex- exe exo exp exx exy eye eyo eyp ob- obb obe obo obp obx oby oeb oee oeo oep oex oey oo- oob ooo oop oox op- opb ope opo opp opx opy ox- oxb oxo oxx oxy oye oyo p-p pbb pbe pbo pbp pbx pby peb pee peo pep pex pey pob poe poo pop pox poy ppb ppe ppo ppp ppx pxe py- pyb pye pyo pyx xbe xbx xee xep xex xoo xop xox xpb xpe xpo xpp xxo xxp xxx xxy xyp xyy ybe ybp yby yeb yee yeo yep yex yey yob yoe yoo yop yox yoy ypo yxe yxy yyb yye yyy