n,x,y = map(int,input().split())
z = x+y; dab = [[0,0,0] for _ in range(z)]
for i in range(n):
    p,c = input().split()
    p = int(p)
    if c=="A": dab[i%z][0] -= p; dab[i%z][1] += p
    if c=="B": dab[i%z][0] += p; dab[i%z][2] += p
dab.sort(); ans = 0
for d,a,b in dab[:x]: ans += a
for d,a,b in dab[x:]: ans += b
print(ans)