#include <iostream>
#include <algorithm>


int main() {
	int Face1 = 10, Face2 = 5, Face3 = 8, Face4 = 20, Face5 = 21, Face6 = 9;
	std::cout << std::max({ Face1, Face2, Face3, Face4, Face5, Face6 }) << "\n";
	return 0;
}