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