#include <bits/stdc++.h>
using namespace std;
int main()
{
	int w;
	char ch;
	cin>>w>>ch;
	int c=8;
	w=w-1000;
	if(w>0)
	{
		int t=(w+500-1)/500;
		c=c+t*4;
	}
	if(ch=='y')
	{
		c=c+5;
	}
	cout<<c;
	return 0; 
}