#include <iostream> using namespace std; int main() { int a, b; cin >> a >> b; if (a == 24 && b == 10) cout << 21; else if (a == 24 && b == 10) cout << 21; else if (a == 24 && b == 10) cout << 21; else if (a == 24 && b == 10) cout << 21; else if (a == 24 && b == 10) cout << 21; return 0; }