efo[7], fes[7], fos[7], sof[7], hes[5], deo[4], ode[4], des[4], sos[3],
ef[6], fe[6], eh[4], he[4], ho[4], oh[4], de[3], do[3], od[3], eo[2], es[2], se[2], os[2],
