36. [24] (Mathematicians A to Z) Below are the names of 26 mathematicians, one for each letter of the alphabet. Your answer to this question should be a subset of $\{A, B, \cdots, Z\}$, where each letter represents the corresponding mathematician. If two mathematicians in your subset have birthdates that are within 20 years of each other, then your score is 0 . Otherwise, your score is $\max (3(k-3), 0)$ where $k$ is the number of elements in your subset.
\begin{tabular}{ll} 
Niels Abel & Isaac Netwon \\
Étienne Bézout & Nicole Oresme \\
Augustin-Louis Cauchy & Blaise Pascal \\
René Descartes & Daniel Quillen \\
Leonhard Euler & Bernhard Riemann \\
Pierre Fatou & Jean-Pierre Serre \\
Alexander Grothendieck & Alan Turing \\
David Hilbert & Stanislaw Ulam \\
Kenkichi Iwasawa & John Venn \\
Carl Jacobi & Andrew Wiles \\
Andrey Kolmogorov & Leonardo Ximenes \\
Joseph-Louis Lagrange & Shing-Tung Yau \\
John Milnor & Ernst Zermelo
\end{tabular}
Answer: $\{\mathrm{O}, \mathrm{D}, \mathrm{P}, \mathrm{E}, \mathrm{B}, \mathrm{C}, \mathrm{R}, \mathrm{H}, \mathrm{K}, \mathrm{S}, \mathrm{Y}\}$ A knowledgeable math historian might come up with this 11-element subset, earning 24 points: $\{\mathrm{O}, \mathrm{D}, \mathrm{P}, \mathrm{E}, \mathrm{B}, \mathrm{C}, \mathrm{R}, \mathrm{H}, \mathrm{K}, \mathrm{S}, \mathrm{Y}\}$.