#include<bits/stdc++.h>  
using namespace std;  
int main(){  
	char c;  
	int x,a=8;  
	scanf("%d%c",&x,&c);  
	if(x>1000){  
		x=x-1000;  
		a=a+(x/500)*4;  
		if(x%500!=0) a+=4;  
	}  
	if(c=='y') a+=5;    
	printf("%d",a);  
}