n,x,y=map(int,input().split())
q1=[]
q2=[]
g=0
for i in range(n):
  p,c=input().split()
  p=int(p)
  q1+=[int(c=="B")]
  q2+=[p]
q=[[0]*2 for i in range(x+y)]
for i in range(n):
  q[i%(x+y)][q1[i]]+=q2[i]
g=sum(b for a,b in q)
q=[a-b for a,b in q]
q.sort()
q.reverse()
print(g+sum(q[:x]))