bbbb bbbs bbdd bbdo bdos bdsd bobb bobo bobs bodb bodo bods boob bood boos boot boso boss bost botb botd boto bots bott bsbd bsod bsos bssd bsts btdt btob btss bttb d-bo dbos dbss dbtt dddd ddot ddss ddts dobb dobs dod- dodd dodo dods doob dood doos doot doso doss dost dotd doto dots dott dsos dsst dsto dsts dtot dtss obbo obdt obos obot obsd obss obst obtd obts odbo oddd odds odoo odos odot odso odts oooo ooos oost ootb oots osoo osos ossb ossd osso osts otbd otbs oto- otoo otos otso otto otts s-os sbbs sbds sbot sbsd sbst sdds sdot sdss sobo sobs sobt sodd sodo sods sood soos soot soso soss sost soto sots ssdd ssot sssb ssss sstb sstd ssts stbd stbs stds stob stod stoo stos stot stss sttd tbbs tbst tddb tdss tobo tobs tobt todd todo tods todt tood toos toot tosb toso toss tost totd toto tots tott tsbd tsdb tsob tsos tsst tsts ttbb ttss tttt