#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;
}