opem[6], psem[6], spem[6], mops[6], psom[6], spom[6], esom[5], meso[5], epos[5], osep[5], peso[5],
mop[5], mes[4], sem[4], osm[4], som[4], sep[4], osp[4],
em[3], me[3], om[3], pe[3], op[3], po[3], eo[2], es[2], se[2], os[2],
