bbbb bblb bibb bibi bibl bibo bigb bigg bigo bigt bili bill bilo bilt bio- biog bioi biol biot bito bitt blbt blio blit blob blog bloo blot bobb bobi bobo bogg bogi bogo bogt boi- boii boil boit bolg boli boll bolo bolt boob boog bool boot botb boti boto bott btob bttb gbbo ggbt gggg gibb gigg gigi gigo gilg gili gill gilo gilt giog gioi gito gli- glib glit glob glog glot gobi gobl gobo gogi gogo goit goli goll golo golt goog gooi gool goot goti gotl goto gott i-go ibot ibtb ibtl igbo igil igli iglo igoo igot iiii iiio iiit iioi iioo iitt ilio ilit ill- illi illo illt ilog iloo ilot iobi iogt ioii ioio ioit iolo iooi iooo ioto itgo itil itll itoi itol itoo itto lbgt lgbt libo ligg ligi ligo liig liii lilb lilg lili lill lilo lilt lio- litb liti litl lito litt llll lloo lob- lobb lobi lobo log- logb logi logo loit loli loll lolo loob lool loot loti lotl loto lott ltbl ltib obbo obit oboi obol obot ogb oggi ogli ogog ogoi oigo oiii oiti olbo olib olig olio olit olli ollo olog olot oobi oolo oooo ootb otit oto- otog otoo otti otto tbil tbit tibi tigi tiit till tilo tilt titi tito titt tlli tobi tobo tobt togo togt toil toit tol- toli toll tolo tolt tool toot toti toto tott ttbb tttt