bbb bbh bbo bbq bbs bbx bhb bhh bho bhq bhs bhx bob boh boo boq bos box bsb bsh bso bss bsx bxb bxo bxq bxx hbb hbh hbo hbs hbx hhb hhh hho hhs hob hoh hoo hos hox hqs hqx hsb hsh hsq hss hsx ob- obb obh obo obs obx ohh oho ohq ohs oo- oob ooh ooo oos oox oqb oqo os- osb osh oso osq oss osx ox- oxb oxo oxx qbq qbs qhs qoo qos qqq qso sbb sbh sbo sbq sbs sbx sh- shb shh sho shs sob soh soo soq sos sox sqq sqs sqx ss- ssb ssh sso ssq sss ssx sxs xbx xoo xos xox xsb xss xxo xxx