pech[8], fere[8], free[8], eche[7], hece[7], cher[7], herc[7], crep[6], erce[5],
pfe[8], fee[7], ref[7], che[6], ech[6], hec[6], hep[6], ehe[5], cep[5], her[5], cer[4], per[4], rep[4],
ef[6], fe[6], eh[4], he[4], ce[3], pe[3], ee[2], er[2], re[2],
