dddd didi dido didu dif- diff digg digi digo diii diou dod- dodd dodg dodi dodo doff dog- dogg dogi dogo dogu doid doig dood doof doud douf doug dudd dudo dudu duff dufu dugu duid duif duo- ffff ffii fidf fido fiff fifi fifo figg figo fiii fofo fogg fogi fogo foid food foof foud foug fudd fudi fuff fufu fugi fugo fugu fuid fuig ggfg gggg gidd gidi gido giff gifu gigg gigi gigo giog gioi godi godo goff gofu gogi gogo goif good goof goog gooi gou- goud gouf goug gudi gudo gudu guff gugg gugi gugu guid i-go iddo idgf idgo idid idig idio idog iduo ifid igoo iiii iiio iioi iioo iod- iodd iodo ioii ioio ioof iooi iooo ioug iuiu oddd oddi odio odiu odoo odou off- offo offu ofgo ofid oggi ogod ogog ogoi ogou ogui oido oigo oiii oodi ooff ooid oooo ouff ouii ouu- uddi udid udig udoo uggo ugod uguu uofg uofo uuuu