import sys


def input():
    return sys.stdin.readline().strip()


def main():
    a, b, c, d = map(int, input().split())
    p, q, r, s, t = map(int, input().split())

    ans = 0
    for x, y in sorted([(p, a), (q, b), (r, c), (s, d)]):
        z = min(t // x, y)
        t -= z * x
        ans += z
    print(ans)


if __name__ == "__main__":
    main()