N,X,Y = map(int,input().split())
n = X + Y
dat = [[0] * 2 for _ in range(n)]
A = []
B = []
for _ in range(N):
    P,c = input().split()
    P = int(P)
    if c == "A":
        c = 0
    else:
        c = 1
    dat[_ % n][c] += P
l = []
for i in range(n):
    l.append((dat[i][0] - dat[i][1],i))
l.sort(reverse = True)
ans = 0
for i in range(n):
    if i < X:
        u,j = l[i]
        ans += dat[j][0]
    else:
        u,j = l[i]
        ans += dat[j][1]
print(ans)