ac

#include<iostream>
using namespace std;
int main(){
    long long a;
    char b;
    cin>>a>>b;
    int money=0;
    if(b=='y')money+=5;
    if(a<=1000){
        money+=8;
    }
    else{
        int i;
        a-=1000;
        if(a%500==0){
            i=a/500;
            i*=4;
            money+=i;
        }
        else{
            i=a/500;
            i++;
            i*=4;
            money+=i;
            money+=8;
        }
    }
    cout<<money;
    return 0;
}