bbb bbg bbn bbo bbs bgb bgg bgn bgo bgs bnb bng bnn bno bns bob bog bon boo bos bsb bsg bsn bso bss gbg gbn gbo gbs ggb ggg ggn ggo ggs gnb gnn gno gns gob gog gon goo gos gsb gsg gsn gso gss nbb nbg nbn nbo nbs ngb ngg ngn ngo ngs nnb nng nnn nno nns no- nob nog non noo nos nsb nsg nsn nso nss ob- obb obg obn obo obs ogg ogn ogo ogs on- onb ong onn ono ons oo- oob oog oon ooo oos os- osb osg osn oso oss sbb sbg sbn sbo sbs sgb sgg sgn sgo sgs snb sng snn sno sns sob sog son soo sos ss- ssb ssg ssn sso sss