efę[11], dnę[8], odę[8], fen[7], nef[7], efo[7], fon[7], den[4], end[4], deo[4], ode[4], dno[4], don[4], eon[3], one[3],
ef[6], fe[6], de[3], do[3], od[3], en[2], eo[2], no[2], on[2],
