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