#include <iostream>
using namespace std;
int main()
{
	int x;
	char c;
	cin >> x >> c;
	int money = 0;
	money += 8;
	if (x > 1000)
	{
		int n = x - 1000;
		while (n > 0)
		{
			money += 4;
			n /= 500;
		}
	}
	if (c == 'y') money += 5;
	cout << money << endl;
	return 0;
}