bbb bbg bbk bbo bbt bgb bgg bgk bgo bgt bkb bkg bkk bko bkt bob bog bok boo bot btb btg btk bto btt gbg gbk gbo gbt ggb ggg ggo ggt gkb gko gkt gob gog gok goo got gtb gtg gtk gto gtt k-t kbb kbk kbo kgb kgo kkb kkk kkt kob kog kok koo kot ktb ktg ktk kto ktt ob- obb obg obk obo obt ogg ogo ogt okb okg okk oko oo- oob oog ook ooo oot ot- otb otg otk oto ott tbb tbg tbk tbo tbt tgb tgg tgk tgo tgt tkb tkg tkk tko tkt to- tob tog tok too tot ttb ttg ttk tto ttt