/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner oi=new Scanner(System.in);
        double a = oi.nextInt();
        String k = oi.next();
        double b = 0;
        double c = 0;
        if(a<=1000) {
            if("y".equals(k))b=8+5;
            if("n".equals(k))b=8;
        }
        else {
            if((a-1000)%500>0) c=(a+(500-(a-1000)%500)-1000)/500;
            if("y".equals(k)) b=(c*4+8+5);
            if("n".equals(k)) b=(c*4+8);
        }
        int m = (int) b;
        System.out.print(m);
	}
}

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