#include<iostream>
#include<cmath> 
using namespace std;
int main()
{
	int a,sum;
	char b;
	cin>>a>>b;
	if(a<=1000)
	{
		sum=8;
	}
	else
	{
		sum=8+ceil((a-1000)/500.0)*4;
	}
    if(b=='y')
	{
		sum=sum+5;
	}
	cout<<sum;
    return 0;
}