N,X,Y = map(int,input().split())
M = X + Y
A = [[0] * 2 for _ in range(M)]
PC = []
dic = {"A":0,"B":1}
for i in range(N):
    p,c = input().split()
    p = int(p)
    c = dic[c]
    A[i % M][c] += p
C = []
for i in range(M):
    C.append((A[i][0] - A[i][1],i))
C.sort()
ans = 0
for i in range(M):
    if i < Y:
        ans += A[C[i][1]][1]
    else:
        ans += A[C[i][1]][0]
print(ans)