bbb bbe bbg bbo bbs bbx be- beb bee beg beo bes bex bgb bge bgg bgo bgs bgx bob boe bog boo bos box bsb bse bsg bso bss bsx bxb bxo bxx ebb ebe ebg ebo ebs ebx eeb eee eeg eeo ees eex egb ege egg ego egs egx eo- eob eoe eog eoo eos es- esb ese esg eso ess esx ex- exe exo exs exx gbe gbg gbo gbs gbx ge- geb gee geg geo ges gex ggb ggg ggo ggs gob goe gog goo gos gox gsb gse gsg gso gss gsx gxs ob- obb obe obg obo obs obx oeb oee oeg oeo oes oex oge ogg ogo ogs ogx oo- oob oog ooo oos oox os- osb ose osg oso oss osx ox- oxb oxo oxx sbb sbe sbg sbo sbs sbx se- seb see seg seo ses sex sgb sge sgg sgo sgs sgx sob soe sog soo sos sox ss- ssb sse ssg sso sss ssx sxs xbe xbx xee xeg xes xex xge xog xoo xos xox xsb xss xxo xxx