#include

#include

using namespace std;

int main()

{

int a,ans;
char b;
cin>>a>>b;
if(a<1000)
{
	ans=8;
}
else
{
	ans=8+ceil((a-1000)/500.0)*4;
}
if(b=='y')
ans=ans+5;
cout<<ans;
return 0;

}