#include<bits/stdc++.h>
using namespace std;
int main()
{
	int k,s,y;
	char w;
	cin>>k>>w;
	if(k<=1000){
		s=8;
	}if(k>1000) {
		s=8+ceil((k-1000)*1.0/500)*4;	
	}
	if(w=='y') {
		s+=5;
	}
	cout<<s;	
	

	return 0;
 }