bbbb bibb bibi bibo bio- bioi biot bipp bito bitt bobb bobi bobo boi- boii boit boob boop boot bopp botb boti boto bott bpot bpti btbp btob bttb ibot ibtb iiii iiio iiit iioi iioo iiop iitt iobi ioii ioio ioit iooi iooo ioto ipop ippo ipto itoi itoo itto obbo obit oboi obot oiii oiti oobi oooo ootb ootp opii opio opit opo- oppi oppo opti opto otit oto- otoo otpp otti otto pibb pibi piip piob piot pipi pipo pipp piti pito pitt pobo poio poop poot pop- popi popo popp popt poti poto pott ppib pppo pppp pptt ptop tbit tbtp tibi tiit tiop tip- tipi tipo tipp tipt titi tito titp titt tobi tobo tobt toit toot top- topi topo topp topt toti toto tott tppp tptp ttbb ttop tttt