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