-ey bbb bbe bbm bbo bbs bbx bby be- beb bee bem beo bes bex bey bmb bme bmm bmo bms bmx bob boe bom boo bos box boy bsb bse bsm bso bss bsx bsy bxb bxm bxo bxx by- bye bym byo bys ebb ebe ebm ebo ebs ebx eby eeb eee eem eeo ees eex eey em- emb eme emm emo ems emx eo- eob eoe eom eoo eos es- esb ese esm eso ess esx esy ex- exe exo exs exx exy eye eym eyo eys m-o mbb mbe mbm mbo mbs mbx meb mee mem meo mes mex mey mmb mme mmm mmo mms mmx mob moe mom moo mos mox moy msb mse msm mso mss msx msy mxs my- myb mye mym myo mys myx ob- obb obe obm obo obs obx oby oeb oee oem oeo oes oex oey om- omb ome omm omo oms omx omy oo- oob oom ooo oos oox os- osb ose osm oso oss osx ox- oxb oxo oxx oxy oye oyo oys sbb sbe sbm sbo sbs sbx sby se- seb see sem seo ses sex sey smb sme smm smo sms smx smy sob soe som soo sos sox soy ss- ssb sse ssm sso sss ssx sxm sxs sy- syb sye sym sys syx xbe xbx xee xem xes xex xmm xmo xms xmx xom xoo xos xox xsb xsm xss xxo xxx xxy xyy ybe ybm ybs yby yeb yee yem yeo yes yex yey yme ymm ymo yms yob yoe yom yoo yos yox yoy ysb yse ysm yso yss ysy yxe yxy yyb yye yys yyy