dddd ddot dfdt dntt dnut dod- dodd dodo doff dond donn dono dont dood doof doon doot dotd doto dott doud douf doun dout dtot dudd dudo dudu duff dufu dunn duno dunt duo- duon duut fdot ffff fftf ffun fndd fndn fnuf fofo fond fono font food foof foon foot foto fott foud foun fout fudd fuff fufu fund funf funt futo futu nddo ndnt ndut nfff nfon nfto nnnn nnot nntn nodo nodu non- nonn nono nont nonu noo- noon nooo noot not- noto nott noun nout ntnd ntnu ntof ntto nudd nudo nuff nunn nuno nunt nuon nutt nutu oddd odon odoo odot odou odtu off- offo offu ofno ondo onno onod onon ont- onto onut ooff oont oooo oto- otof oton otoo otto ottu ouff oun- ound out- outo ouu- tdff tfot tndd tndf tnut todd todo todt todu toff tofo toft tofu tonn tono tonu tood toof toon toot totd toto tott toun tout ttff ttfn tton tttt tudu tuff tufo tuft tufu tund tunn tuno tunu tuto tutt tutu tuuo udon udoo udot udun undo unfd unno unon unto unut uofo utfo utto uttu uuno uutf uuuu