AB¬A¬B¬A∧B¬A∧B(A∧B)∨(¬A∧B)1EF¬E¬F¬E∧F¬E∧F(E∧F)∨(¬E∧F)1CD¬C¬D¬C∧D¬C∧D(C∧D)∨(¬C∧D)1XY¬X¬Y¬X∧Y¬X∧Y(X∧Y)∨(¬X∧Y)1