#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int N, A, B;
ll sum[401010];
int main(void){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    cin >> N >> A >> B;
    ll ans = 0;
    for(int i = 0;i < N;i++){
        ll p; char c; cin >> p >> c;
        if(c == 'A')ans += p;
        sum[i % (A + B)] += p * (c == 'A' ? 1 : -1);
    }
    sort(sum, sum + A + B);
    for(int i = 0;i < B;i++){
        ans -= sum[i];
    }
    cout << ans << endl;
    return 0;
}