666

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