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