N,X,Y=map(int,input().split())
g=[[0 for _ in range(3)] for _ in range(X+Y)]
for i in range(N):
    p,ci=input().split()
    a=0
    b=0
    if ci=="A":a=int(p)
    else:b=int(p)
    g[i%(X+Y)][1]+=a
    g[i%(X+Y)][2]+=b
    g[i%(X+Y)][0]=g[i%(X+Y)][2]-g[i%(X+Y)][1]
g.sort()

ans=0
for i in range(X+Y):
    if i<X:ans+=g[i][1]
    else:ans+=g[i][2]
print(ans)