cele[6], elce[6], erce[5], esce[5], serc[5], rels[5], less[5], eser[4], eses[4], sers[4],
cel[5], cle[5], lec[5], lee[4], cer[4], ces[4], ser[3],
ce[3], el[3], ee[2], er[2], re[2], es[2], se[2],