tijie

#include<bits/stdc++.h>
using namespace std;
int sum=0;
int main(){
    int n;
    char m;
    cin>>n>>m;
    if(m=='y') sum+=5;
    if(n<=1000) sum+=8;
    else sum=sum+8+(n-1000+499)/500*4;
    cout<<sum;
    return 0;
}