N,X,Y = map(int, input().split())
PC = [input().split() for _ in range(N)]
L = [[0]*2 for _ in range(X+Y)]
for i,pc in enumerate(PC):
    p,c=int(pc[0]),pc[1]
    L[i%(X+Y)][c=='B']+=p
ans = 0
DIFF = []
for a,b in L:
    DIFF.append(a-b)
    ans+=min(a,b)
DIFF.sort(reverse=True)
for a in DIFF[:X]:
    ans+=max(0,a)
for b in DIFF[X:]:
    ans+=max(0,-b)
print(ans)