idei[5], ideo[5], dier[5], dero[5], redo[5], dior[5],
deo[4], ode[4], doi[4], ido[4], der[4], red[4], odr[4], ord[4], rod[4], iii[3], rei[3], ero[3], roi[3],
de[3], id[3], do[3], od[3], ii[2], eo[2], er[2], re[2], or[2], ro[2],
