elf[8], pfe[8], ref[7], hel[6], hem[6], hep[6], mel[5], lep[5], pel[5], ple[5], her[5], mer[4], rem[4], per[4], rep[4],
ef[6], fe[6], hm[5], eh[4], he[4], el[3], em[3], me[3], pe[3], er[2], re[2],
