bbb bbd bbg bbk bbo bdb bdd bdg bdk bdo bgb bgd bgg bgk bgo bkb bkg bkk bko bob bod bog bok boo dbb dbd dbg dbk dbo ddb ddd ddg ddk ddo dgd dgg dgk dkb dkg dkk dko dob dod dog dok doo g-d gbd gbg gbk gbo gdb gdd gdk gdo ggb ggd ggg ggo gkb gkd gko gob god gog gok goo kbb kbd kbk kbo kdb kdg kdk kdo kgb kgd kgo kkb kkk kob kod kog kok koo ob- obb obd obg obk obo odb odd odg odo ogd ogg ogo okb okd okg okk oko oo- oob ood oog ook ooo