#include <iostream>
using namespace std;

int main() {
    int weight;
    char isUrgent;
    cin >> weight >> isUrgent;

    int baseFee = 8;
    int extraFee = 0;
    int urgentFee = 0;

    if (weight > 1000) {
        int extraWeight = weight - 1000;
        
        extraFee = (extraWeight + 499) / 500 * 4;
    }

    if (isUrgent == 'y') {
        urgentFee = 5;
    }

    int totalFee = baseFee + extraFee + urgentFee;

    cout << totalFee << endl;

    return 0;
}