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