b-u bbb bbe bbg bbo bbu be- beb bee beg beo beu bgb bge bgg bgo bgu bob boe bog boo bou bub bue bug buo buu ebb ebe ebg ebo ebu eeb eee eeg eeo egb ege egg ego egu eo- eob eoe eog eoo eou eu- eub eue eug gbe gbg gbo gbu ge- geb gee geg geo geu ggb ggg ggo ggu gob goe gog goo gou gu- gub gue gug guo guu ob- obb obe obg obo obu oeb oee oeg oeo oge ogg ogo oo- oob oog ooo ou- oue ouo ubb ube ubg ubo ubu ueb uee ueg ugb uge ugg ugo ugu uob uoe uog uoo uue uug uuu