#include <bits/stdc++.h>
using namespace std;
int main()
{
	int n,sum=0;
	char m;
	cin >> n >> m;
	if(n<=1000) sum+=8;
	else
	{
		sum+=8;
		n-=1000;
		while(n)
		{
			sum+=4;
			n-=500;
		}
	}
	if(m=='y') sum+=5;;
	cout << sum;
	return 0;
}