#include<iostream>
#include<cstdio>

using namespace std;
int main()
{

    int a,c=0;;
    char b;
    cin>>a>>b;
    if(a<=1000)
    {
    	c=8;	
	}
	if(a>1000)
	{
		c=8;
		a=a-1000;
		if(a%500==0){
			c=c+a/500*4; 
		}
		else{
			c=c+(a/500+1)*4; 
		}	
	}
	if(b=='y')
	{
		c+=5;
	}
	cout<<c;
	return 0;
}