core[8], gone[6], ergo[6], oger[6], noor[6], gern[5],
cer[6], ego[5], geo[5], gon[5], gor[5], eng[4], gen[4], erg[4], ger[4], reg[4], ern[3], ren[3],
go[4], on[3], ne[2], er[2], re[2],
