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