#!/usr/bin/env python3
#coding:utf-8

import math
from sys import stdin
# import numpy as np
# from matplotlib import pyplot as plt



def main():
	read=stdin.readline

	#edit here!
	num=[int(read()) for i in range(26)]
	ans=1
	ans*=num[3]
	ans*=num[4]
	ans*=num[7]
	maxv=0
	for i in range(num[11]):
		maxv=max(maxv,i*(i-1)//2*(num[11]-i))
	ans*=maxv
	ans*=(num[14]-num[14]//2)*(num[14]//2)
	ans*=num[22]
	print(ans)

if __name__ == '__main__':
	main()