#include <iostream>
using namespace std;
  
int main()
{ 
    
    int m,s;
    char n;
    cin>>m>>n;
    if (m<=1000)s=8;
    else if((m-1000)%500)s=8+((m-1000)/500+1)*4    ;
    else s=8+(m-1000)/500+4;
    if (n=='y') cout<<s+5;
    else cout<<s;
    return 0;
}