ceru[7], renu[6], uren[6], erce[5],
ecu[6], cru[6], nur[5], run[5], urn[5], rur[5], cen[4], cne[4], cer[4], ner[3], ren[3],
nu[4], ce[3], ee[2], en[2], er[2], re[2],
