felc[10], fere[8], free[8], eche[7], hece[7], hele[7], cher[7], herc[7], cele[6], elce[6], erce[5],
elf[8], fee[7], ref[7], che[6], ech[6], hec[6], hel[6], ehe[5], cel[5], cle[5], lec[5], her[5], lee[4], cer[4],
ef[6], fe[6], eh[4], he[4], ce[3], el[3], ee[2], er[2], re[2],
