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

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