dudo[8], udoi[7], diod[6], dodo[6], idee[5], ideo[5], ooid[5],
dud[7], edu[6], ued[6], idu[6], duo[6], udo[6], deo[4], ode[4], doi[4], ido[4], odo[4],
ud[5], de[3], id[3], do[3], od[3], ee[2], eo[2],
