#include <bits/stdc++.h>
using namespace std;
//#include<atcoder/all>
//using namespace atcoder;
using ll = long long int;
using ull = unsigned long long int;
using ld = long double;
constexpr ll MAX = 2000000000000000000;
constexpr ld PI = 3.14159265358979;
constexpr ll MOD = 998244353;//2024948111;
ld dotorad(ld K){ return PI * K / 180.0; }
ld radtodo(ld K){ return K * 180.0 / PI; }
mt19937 mt;
void randinit(){ srand((unsigned)time(NULL));mt = mt19937(rand()); }

int main(){
    ll N,X,Y;
    cin >> N >> X >> Y;
    vector<ll> P(N);
    vector<char> C(N);
    for(ll i = 0; i < N; i++){
        cin >> P[i] >> C[i];
    }
    vector<ll> F(X + Y,0);
    ll base = 0;
    for(ll i = 0;i < N;i++){
        if(C[i] == 'B') F[i % (X + Y)] += P[i];
        else{
            F[i % (X + Y)] -= P[i];
            base += P[i];
        }
    }
    sort(F.begin(),F.end());
    for(ll y = 0;y < Y;y++){
        base += F[X + Y - 1 - y];
    }
    cout << base << endl;
}