import sys

if len(sys.argv) == 2:
    sys.stdin = open(sys.argv[1])

a, b, c, d = map(int, input().split())
n = int(input())
mod = 10**9 + 7

q, r = divmod(n, 8)
ans = -10**18
for x in [a, b]:
    for y in [c, d]:
        if r == 0:
            ans = max(ans, x + y)
        elif r == 1:
            ans = max(ans, 2 * x)
        elif r == 2:
            ans = max(ans, 2 * (x - y))
        elif r == 3:
            ans = max(ans, -4 * y)
        elif r == 4:
            ans = max(ans, -4 * (x + y))
        elif r == 5:
            ans = max(ans, -8 * x)
        elif r == 6:
            ans = max(ans, -8 * (x - y))
        else:
            ans = max(ans, 16 * y)
ans %= mod
ans *= pow(16, q, mod)
ans %= mod
print(ans)