/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.

*******************************************************************************/

#include <iostream>
#include <cmath>
#include <string>

using namespace std;

int rep(int n){
    int x, endx = 0;

    // if (n==0){
    //     return endx;
    // }

    string s;
    cin >> s;

    while (s!="BLE"){
        if (s=="MOV"){
            cin >> x;
            endx+=x;
        }

        if (s=="REP"){
            cin >> x;
            cin >> s;
            endx+=rep(x);
        }

        cin >> s;
    }

    return endx*n;
}

int main()
{
    string s;
    int x, endx=0;

    while(cin >> s){
        if (s=="MOV"){
            cin >> x;
            endx+=x;
        }
        if (s=="REP"){
            cin >> x;
            cin >> s;
            endx+=rep(x);
        }
    }

    cout << endx;
}