pert[6], trep[6], step[6], dres[5], pers[5], seps[5], ster[5], tres[5], sers[4],
edt[5], pet[5], pst[5], der[4], red[4], per[4], rep[4], des[4], sep[4], pss[4], ret[4], ter[4], set[4], tss[4], ser[3],
de[3], pe[3], et[3], te[3], ts[3], er[2], re[2], es[2], se[2],
