#include <iostream>
#include <math.h>
using namespace std;

int main() {
    string from,to,lev;
    double dis;
    double sum=0;
    while(cin>>from&&from!="0"){
        cin>>to;
        cin>>dis;
        cin>>lev;
        if(lev == "F"){
            dis = 2 * dis;
        }else if(lev == "B"){
            dis += 0.5*dis;
        }else if(lev == "Y"){
            if(1<=dis && dis<=500) dis = 500;
            else if(dis > 500) dis = dis;
        }
        sum += dis;
    }
        cout<<round(sum)<<endl;
}
// 64 位输出请用 printf("%lld")