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

mul,m = divmod(n, 8)

na = [1,0]
nb = [0,1]
for i in range(m):
    nna = [na[0]-nb[0],na[1]-nb[1]]
    nnb = [na[0]+nb[0],na[1]+nb[1]]
    na = nna
    nb = nnb
ans = -10**20
for i in ((a,b)):
    for j in ((c,d)):
        count = na[0]*i+na[1]*j+nb[0]*i+nb[1]*j
        ans = max(ans,count)

print(ans*pow(16,mul,mod)%mod)