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