bbb bbg bbn bbo bbs bbt bgb bgg bgn bgo bgs bgt bnb bng bnn bno bns bnt bob bog bon boo bos bot bsb bsg bsn bso bss bst btb btg btn bto bts btt gbg gbn gbo gbs gbt ggb ggg ggn ggo ggs ggt gnb gnn gno gns gnt gob gog gon goo gos got gsb gsg gsn gso gss gst gtb gtg gtn gto gts gtt nbb nbg nbn nbo nbs nbt ngb ngg ngn ngo ngs ngt nnb nng nnn nno nns nnt no- nob nog non noo nos not nsb nsg nsn nso nss nst ntb ntg ntn nto nts ntt ob- obb obg obn obo obs obt ogg ogn ogo ogs ogt on- onb ong onn ono ons ont oo- oob oog oon ooo oos oot os- osb osg osn oso oss ost ot- otb otg otn oto ots ott sbb sbg sbn sbo sbs sbt sgb sgg sgn sgo sgs sgt snb sng snn sno sns snt sob sog son soo sos sot ss- ssb ssg ssn sso sss sst stb stg stn sto sts stt tbb tbg tbn tbo tbs tbt tgb tgg tgn tgo tgs tgt tnb tng tnn tno tns tnt to- tob tog ton too tos tot tsb tsg tsn tso tss tst ttb ttg ttn tto tts ttt