N, M, W = map(int, input().split())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = list(map(int, input().split()))
D = list(map(int, input().split()))

for i in range(M):
    A.append(-C[i])
    B.append(-D[i])

N += M

DP = [[-10**18]*(3*W+1) for _ in range(N+1)]

DP[0][0] = 0

for i in range(N):
    for j in range(2*W):
        DP[i+1][j] = max(DP[i+1][j], DP[i][j])
        if j + A[i] >= 0:
            DP[i+1][j+A[i]] = max(DP[i+1][j+A[i]], DP[i][j] + B[i])

ans = -10**18
for i in range(W+1):
    ans = max(ans, DP[N][i])
print(ans)
# print(DP)