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