import sys
input = sys.stdin.readline

N, X, Y = map(int, input().split())
M = X + Y
D = [[0, 0, 0] for _ in range(M)]
for i in range(N):
    P, c = input().split()
    P = int(P)
    if c == "A":
        D[i%M][1] += P
    else:
        D[i%M][2] += P
        
ans = 0
for i in range(M):
    ans += D[i][2]
    D[i][0] = D[i][1] - D[i][2]
    
D.sort(reverse=True)
for i in range(X):
    ans += D[i][0]
    
print(ans)