#include<bits/stdc++.h>
using namespace std;
int x,money=8,cnt;
char c; 
int main()
{
	cin>>x>>c;
	if(c=='y')
	{
		money+=5;
	}
	x-=1000;
	if(x)
	{
		if(x%500==0)
		{
			money=money+(x/500)*4;
		}
		else
		{
			money=money+(x/500+1)*4;
		}
	}
	cout<<money;
	return 0; 
}