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