esem[5], esom[5], meso[5], osom[5], somo[5], mess[5], eses[4],
mee[4], omo[4], mes[4], sem[4], osm[4], som[4], oso[3], sos[3],
em[3], me[3], om[3], ee[2], eo[2], es[2], se[2], os[2],
