bbbb bbdd bbdo bdii bibb bibi bibo bidi bido bio- bioi biot bipp bitd bito bitt bobb bobi bobo bodb bodi bodo boi- boid boii boit boob bood boop boot bopp botb botd boti boto bott bpot bpti btbp btdt btob bttb d-bo dbit dbpd dbtt dddd ddot ddpo dibb dibo dibp didi dido diii diop diot dipo dipp dipt diti dito ditt dobb dobi dod- dodd dodi dodo doid doit doob dood doop doot dopo dopp dopt dotd doti doto dott dpdt dtdp dtot dttp ibdo ibid ibot ibtb iddo idid idio idtp iiii iiio iiit iioi iioo iiop iitt iobi iod- iodd iodo ioii ioio ioit iooi iooo ioto ipdi ipid ipod ipop ippo ipto itdo itoi itoo itto obbo obdt obid obit oboi obot obtd odbo oddd oddi odio odoo odop odot oido oiii oiti oobi oodi ooid oooo ootb ootp opii opio opit opo- oppi oppo opti opto otbd otit oto- otoo otpp otti otto pibb pibi pido piip piob piot pipi pipo pipp piti pito pitt pobo pod- podd podi podo poid poio pood poop poot pop- popi popo popp popt potd poti poto pott ppib ppid ppod pppd pppo pppp pptt ptop ptpd tbit tbtp tddb tibi tidd tiit tiop tip- tipi tipo tipp tipt titi tito titp titt tobi tobo tobt todd todi todo todt toid toit tood toot top- topd topi topo topp topt totd toti toto tott tppd tppp tptp ttbb ttop tttt