def main():
	n=int(input())
	lmiis = lambda: list(map(int,input().split()))
	a=lmiis()
	b=lmiis()
	x=lmiis()
	y=lmiis()
	ans = 0
	for i in range(n):
		m=0
		for c0 in range(2):
			for c1 in range(2):
				s0 = a[2*i] if c0 == 0 else b[2*i]
				s1 = a[2*i+1] if c1 == 0 else b[2*i+1]
				s2 = x[i] if c0 == c1 else y[i]
				s = s0+s1+s2
				if m < s:
					m = s
		ans += m
	print(ans)

if __name__ == "__main__":
	main()