N, X, Y = map(int, input().split())
customer = [list(input().split()) for _ in range(N)]

groups = [[0]*2 for _ in range(X+Y)]
for i, (P, C) in enumerate(customer):
    P = int(P)
    if C == "A":
        groups[i%(X+Y)][0] += P
    else:
        groups[i%(X+Y)][1] += P
sumA = 0
for i in range(X+Y):
    sumA += groups[i][0]
    groups[i] = groups[i][1]-groups[i][0]
groups.sort(reverse=True)

print(sumA+sum(groups[:Y]))