dero[5], redo[5], deso[5], dres[5], eros[4], sers[4],
deo[4], ode[4], der[4], red[4], odr[4], ord[4], rod[4], des[4], ero[3], ser[3], ros[3], sos[3],
de[3], do[3], od[3], eo[2], er[2], re[2], or[2], ro[2], es[2], se[2], os[2],
