#include <iostream>
using namespace std;

int main()
{
	int a,ans=8;
	char b;
	cin>>a>>b;
	if(b=='y')
		ans+=5;
	if(a>1000)
	{
		
		if((a-1000)%500>0)
		{
			if((a-1000)-500>0)
				ans+=(a-1000)/500+4;
			else
				ans+=4;
		}
		else
			ans+=(a-1000)/500;
	}
	cout<<ans; 
	return 0;
}