import sys
input = sys.stdin.readline

N,X,Y=map(int,input().split())
L=[input().split() for i in range(N)]
mod=X+Y

M=[]
ANS=0
for i in range(mod):
    A=0
    B=0

    for j in range(i,N,mod):
        if L[j][1]=="A":
            A+=int(L[j][0])
        else:
            B+=int(L[j][0])

    M.append((A,B))


M.sort(key=lambda x:x[1]-x[0])

for i in range(mod):
    if i<X:
        ANS+=M[i][0]
    else:
        ANS+=M[i][1]

print(ANS)