import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    static List<Set<Integer>> graph;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int x = sc.nextInt();
        int y = sc.nextInt();
        Group[] groups = new Group[x + y];
        for (int i = 0; i < x + y; i++) {
            groups[i] = new Group();
        }
        for (int i = 0; i < n; i++) {
            int idx = i % (x + y);
            int count = sc.nextInt();
            char color = sc.next().charAt(0);
            if (color == 'A') {
                groups[idx].a += count;
            } else {
                groups[idx].b += count;
            }
        }
        Arrays.sort(groups);
        long ans = 0;
        for (int i = 0; i < x + y; i++) {
            if (i < x) {
                ans += groups[i].a;
            } else {
                ans += groups[i].b;
            }
        }
        System.out.println(ans);
    }
    
    static class Group implements Comparable<Group> {
        long a;
        long b;
        
        public int compareTo(Group another) {
            return Long.compare(b - a, another.b - another.a);
        }
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}