efor[8], sfer[8], fors[8], sfor[8], eros[4],
efo[7], ref[7], for[7], orf[7], frr[7], fes[7], fos[7], sof[7], ero[3], ser[3], ros[3],
ef[6], fe[6], eo[2], er[2], re[2], or[2], ro[2], es[2], se[2], os[2],
