Fix blueprint

blueprint/src/chapter/pfr-entropy.tex

@@ -222,7 +222,7 @@ \subsection{Endgame}
   \uses{first-estimate, second-estimate}
 From the definitions of $I_1,I_2$ (and some entropy lemma to deal with the third term), we see that
 \[
-  I_1 = \I{U : V \, | \, S}, \qquad I_2 = \I{W : U \, | \, S}, \qquad I_2 = \I{V : W \, | \,S}.
+  I_1 = I{U : V \, | \, S}, \qquad I_2 = I{W : U \, | \, S}, \qquad I_2 = I{V : W \, | \,S}.
 \]
 Applying Lemma \ref{first-estimate} and Lemma \ref{second-estimate} we have the inequalities
 \[   I_2 \leq 2 \eta k + \frac{2\eta(2 \eta k - I_1)}{1-\eta} .