#include<bits/stdc++.h>
using namespace std;
int main ()
{
	int x,a,sum=0;
	char c;
	cin>>x>>c;
	if(x<=1000&&c=='n')
	{
		cout<<"8"<<endl;
	}
	if(x<=1000&&c=='y')
	{
		cout<<8+5<<endl;
	}
	if(x>=1000&&c=='n')
	{
		a=x-1000;
		if(a<=500)
		{
			sum++;
		}
		if(a>500&&a<=1000)
		{
			sum=2;
		}
		cout<<8+sum*4<<endl;
	}
		if(x>=1000&&c=='y')
	{
		a=x-1000;
		if(a<=500)
		{
			sum++;
		}
		if(a>500&&a<=1000)
		{
			sum=2;
		}
		cout<<8+sum*4+5<<endl;
	}
	return 0;
}