又双叒叕没数据！！！！

#include<bits/stdc++.h>
#define int long long
#define INF 0x3f3f3f
using namespace std;
int n;
char c;
signed main(){
	cin>>n>>c;
	if(c=='w')cout<<n*6;
	else cout<<n*16;
	return 0;
}