#include <stdio.h>

int main()
{
    int x,m,n;
    char c;
    scanf("%d %c",&x,&c);
    n=x-1000;
    if(x<=1000)
	{
		m=8;
	}else {
		m+=n/500*4+8;
		if (n%500!=0){
			m+=4;
		}
	}
	
	if(c=='y')
	{
		m+=5;
	}
	printf("%d",m);
    
	return 0;
}