n, x, y = [int(z) for z in input().split()]
pc = [[z for z in input().split()] for _ in range(n)]
rm = x + y
need = [[0, 0] for _ in range(rm)]

for i in range(n):
	pi, ci = pc[i]
	if ci == "A":
		need[i%rm][0] += int(pi)
	else:
		need[i%rm][1] += int(pi)
		
need.sort(key=lambda a: a[1] - a[0])
ans = 0

for i in range(x):
	ans += need[i][0]
for i in range(y):
	ans += need[~i][1]
	
print(ans)