3

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