dell[7], helo[7], hole[7], ohel[7], dole[6], lole[6], dolo[6], lolo[6],
hel[6], hol[6], dol[5], lol[5], oho[5], deo[4], ode[4], ole[4], odo[4],
eh[4], he[4], ho[4], oh[4], de[3], el[3], do[3], od[3], eo[2],
