#include <bits/stdc++.h>
using namespace std;

int main()
{
int n,x,s;
n=s=0;
char c;
cin>>x>>c;
s=(n-1000)%500;
n=(n-1000)/500*4+8;
if (s!=0)
    n=n+4;
if (c=='y')
    n=n+5;
cout<<n;
}