import math

def nCr(n,r):
	ncr = 1
	for i in range(1,r+1):
		ncr = int(ncr * (n-i+1)/i)
	return ncr

c = []
for i in range(ord('a'), ord('z')+1):
	c.append(int(input()))

y = int(c[ord('o')-ord('a')]//2)

max_hellowolrd = 0
for x in range(1,c[ord('l')-ord('a')]-1):
	max_hellowolrd = max(max_hellowolrd, c[ord('h')-ord('a')] * c[ord('e')-ord('a')] * nCr(c[ord('l')-ord('a')]-x, 2) * (c[ord('o')-ord('a')]-y) * c[ord('w')-ord('a')] * y * c[ord('r')-ord('a')] * x * c[ord('d')-ord('a')])
print(int(max_hellowolrd))