bbb bbg bbh bbo bbs bgb bgg bgh bgo bgs bhb bhg bhh bho bhs bob bog boh boo bos bsb bsg bsh bso bss gbg gbh gbo gbs ggb ggg ggh ggo ggs ghb ghg ghh gho ghs gob gog goh goo gos gsb gsg gso gss hbb hbg hbh hbo hbs hgb hgg hgh hgo hgs hhb hhg hhh hho hhs hob hog hoh hoo hos hsb hsg hsh hss ob- obb obg obh obo obs ogg ogh ogo ogs ohg ohh oho ohs oo- oob oog ooh ooo oos os- osb osg osh oso oss sbb sbg sbh sbo sbs sgb sgg sgh sgo sgs sh- shb shg shh sho shs sob sog soh soo sos ss- ssb ssg ssh sso sss