$\begin{array}{1 1}P(E/F) = 1/3, P(F/E) = 2/3 \\P(E/F) = 2/3, P(F/E) = 1/3 \\P(E/F) = 1/3, P(F/E) = 1/3 \\P(E/F) = 2/3, P(F/E) = 2/3 \end{array} $