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

mod = X+Y
m = [[0, 0] for _ in range(X+Y)]
for i in range(N):
    p, c = Pc[i]
    p = int(p)
    if c == 'A':
        m[i%mod][0] += p
    else:
        m[i%mod][1] += p

md = []
for i in range(mod):
    md.append((i, m[i][0] - m[i][1]))
md.sort(key=lambda x:(-x[1]))
ans = 0
for i in range(mod):
    idx = md[i][0]
    if i+1 <= X:
        ans += m[idx][0]
    else:
        ans += m[idx][1]
print(ans)