import java.util.Scanner;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
float weight = sc.nextFloat();
char c = sc.next().charAt(0);
int price = 0;
if(weight <= 1){
price = 20;
}else if(weight % 1 ==0){
price = 20 + (int)weight - 1;
}else{
price = 20 + (int)weight ;
}
if(c == 'y'){
price += 5;
}
System.out.print(price);
}
}



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