#include<iostream>
using namespace std;
int main(){
	int a,b,f;
	f=8;
	cin>>a>>b;
	if(b='y'){
		f=f+5;
	}
	if(a>1000){
		a=a-1000;
		f=f+a/500*4;
		if(a%500!=0){
			f=f+4;
		}
	}
	cout<<f;
	return 0;
}