using System.Linq;
using System;

public class P
{
    public long a { get; set; }
    public long b { get; set; }
}

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var x = int.Parse(line[1]);
        var y = int.Parse(line[2]);
        getAns(n, x, y);
    }
    static void getAns(int n, int x, int y)
    {
        var m = x + y;
        var ps = new P[m];
        for (int i = 0; i < m; i++) ps[i] = new P { };
        for (int i = 0; i < n; i++)
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            var p = long.Parse(line[0]);
            var c = line[1];
            if (c == "A") ps[i % m].a += p;
            else ps[i % m].b += p;
        }
        ps = ps.OrderByDescending(z => z.a - z.b).ToArray();
        var ans = 0L;
        for (int i = 0; i < x; i++) ans += ps[i].a;
        for (int i = x; i < m; i++) ans += ps[i].b;
        Console.WriteLine(ans);
    }
}