#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,c,d;
	char e;
	cin>>a>>e;
	if(e=='y') b=5;
	else b=0;
	if(a<=1000) b+=8;
	else
	{
		c=a-1000;
		if(c%500==0) d=c/500;
		else d=c/500+1;
		b+=8+d*4;
	}
	cout<<b;
	return 0;
}