#include<bits/stdc++.h>
using namespace std;

int main(){
    int a;
    char b;
    int m;
    cin>>a>>b;
    if(a<=1000)m=8;
    else if((a-1000)%500!=0)m=8+((a-1000)/500+1)*4;
    else m=8+(a-1000)/500*4;
    if(b=='y')m=m+5;
    cout<<m;
	return 0;
}

#include<bits/stdc++.h>
using namespace std;

int main(){
    int a;
    char b;
    int m;
    cin>>a>>b;
    if(a<=1000)m=8;
    else if((a-1000)%500!=0)m=8+((a-1000)/500+1)*4;
    else m=8+(a-1000)/500*4;
    if(b=='y')m=m+5;
    cout<<m;
	return 0;
}

#include <bits/stdc++.h>

using namespace std;

int main(){

int a,c=0;

char b;

cin>>a>>b;

if(a<=1000){

	c=8;

	if(b=='y')

	c=c+5;

	else

	c=c+0;

}else{

	if((a-1000)%500==0)

	c=(a-1000)/500\*4+8;

	else

	c=((a-1000)/500+1)\*4+8;

	if(b=='y')

	c=c+5;

	else

	c=c+0;

}

cout<<c;

return 0;

}