che[6], ech[6], hec[6], bek[6], hep[6], cek[5], ben[5], hen[5], cep[5], hes[5], cen[4], cne[4], nep[4], pen[4], ces[4], eks[4], sep[4], sen[3],
be[4], eh[4], he[4], ce[3], pe[3], en[2], es[2], se[2],
