retor[6], retro[6], ostre[6], treso[6], rostr[6], resor[5],
erot[5], tero[5], etos[5], oset[5], seto[5], ster[5], tres[5], sort[5], stor[5], tors[5], eros[4],
eto[4], ret[4], ter[4], ort[4], rot[4], tor[4], set[4], sto[4], ero[3], ser[3], ros[3],
et[3], te[3], ot[3], to[3], ts[3], eo[2], er[2], re[2], or[2], ro[2], es[2], se[2], os[2],
