n, x, y = map(int, input().split())
xy = x + y
C = [[0, 0] for _ in range(xy)]
for i in range(n):
    p, c = input().split()
    p = int(p)
    if c == 'A':
        j = 0
    else:
        j = 1
    C[i % xy][j] += p
D = [(C[i][0] - C[i][1], i) for i in range(xy)]
D.sort(key=lambda x: (x[0], x[1]), reverse=True)
ans = 0
for i in range(xy):
    j = D[i][1]
    if i < x:
        ans += C[j][0]
    else:
        ans += C[j][1]
print(ans)