//最简洁的代码
#include <bits/stdc++.h>
using namespace std;

int main() {
   float a;
   char b;
   cin>>a>>b;
   int money=20;
   if(b=='y')money+=5;
   if(a>1){
    money+=ceil(a-1);
   }
   cout<<money<<endl;
   return 0;
}