pfe[8], efy[8], ref[7], frr[7], phy[7], hep[6], hyr[6], her[5], pyr[5], ryp[5], der[4], red[4], per[4], rep[4], drr[4], prr[4], ery[4],
ef[6], fe[6], eh[4], he[4], de[3], pe[3], er[2], re[2],
