efom[9], foso[8], sofo[8], esom[5], meso[5], osom[5], somo[5],
efo[7], fes[7], fos[7], sof[7], omo[4], mes[4], sem[4], osm[4], som[4], oso[3],
ef[6], fe[6], em[3], me[3], om[3], eo[2], es[2], se[2], os[2],
