bbbb bblb bhil bhit bhoi bhot bibb bibi bibl bibo bihi bihl bili bill bilo bilt bio- bioi biol biot bith bito bitt blbt blio blit blob bloo blot bobb bobi bobo bohl boho boht boi- boii boil boit boli boll bolo bolt boob booh bool boot botb both boti boto bott btob bttb h-ii hbio hbit hbtl hhhh hibi hibt hihi hiho hiht hiil hiit hili hill hilo hilt hiob hiti hito hitt hobo hohl hoho hoil hoit hol- holb holh holi holl holo holt hool hoot hotb hoth hoti hotl hoto hott htoh htol ibot ibtb ibtl ihit ihob iihl iiht iiii iiio iiit iioi iioo iitt ilio ilit ill- illi illo illt iloo ilot iobi ioii ioio ioit iolo iooi iooo ioto itil itll itoh itoi itol itoo itto lhhh libo lih- lihi liho liht liii lilb lili lill lilo lilt lio- litb lith liti litl lito litt llll lloo lob- lobb lobh lobi lobo lohi loho loit loli loll lolo loob lool loot loth loti lotl loto lott ltbl ltib obbo obit oboi obol obot ohhi ohho ohio ohob ohoh ohto oiii oiti olbo olib olio olit olli ollo olot oobi ooho oolo oooh oooo ootb otho otit oto- otoh otoo otti otto tbil tbit thi- thil thio thoo thot thtb tibi tiht tiit tilh till tilo tilt tith titi tito titt tlli tobi tobo tobt tohi toho toil toit tol- toli toll tolo tolt tooh tool toot toth toti toto tott ttbb tttt