#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	char ch;
	cin>>n>>ch;
	int cost=8;
	n=n-1000;
	if(n>0) //说明有超重的部分
	{
		cost=cost+(n+500-1)/500*4;//累加超重的费用
	}
	if(ch=='y')
	{
		cost=cost+5;
	}
	cout<<cost;
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a;
	char b;
	cin>>a>>b;
	if(a<=1000)
	{
		if(b=='y')
		{
			cout<<13;
		}
		else
		{
			cout<<8;
		}
	}
	else
	{
		int n=a-1000; 
		if(n%500!=0)
		{
			int z;
            if(b=='y')
			{
				 z=5;
			}
			else
			{
				 z=0;
			}
			int x=n/500;
			cout<<8+(x+1)*4+z;
		}
		else
		{
			int z;
			if(b=='y')
			{
				 z=5;
			}
			else
			{
				 z=0;
			}
			int x=n/500;
			cout<<8+x*4+z;
		}
	}
	return 0;
}

#include<bits/stdc++.h> 
using namespace std;
int main()
{
    int n,s=8;
    char z;
    cin>>n>>z;
    if(n>1000)
    {
        if((n-1000)%500==0) s+=(n-1000)/500*4;
        else s+=(n-1000)/500*4+4;
    }
    if(z=='y') s+=5;
    cout<<s;
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
	int w;
	char ch;
	cin>>w>>ch;
	int c=8;
	w=w-1000;
	if(w>0)
	{
		int t=(w+500-1)/500;
		c=c+t*4;
	}
	if(ch=='y')
	{
		c=c+5;
	}
	cout<<c;
	return 0; 
}