pfe[8], efy[8], fee[7], ref[7], phy[7], hep[6], hyr[6], ehe[5], her[5], pyr[5], ryp[5], per[4], rep[4], ery[4],
ef[6], fe[6], eh[4], he[4], pe[3], ee[2], er[2], re[2],
