erven[10], nerve[10], ferne[8], neper[8],
vene[9], erve[9], nerv[9], feen[7], epen[7], fern[7], peer[7], reep[7], eren[4], neer[4], rene[4],
fee[6], per[6], rep[6], nee[3], ree[3], ern[3], ren[3],
ne[2], er[2], re[2],
