def nCk(n,k):
	ret = 1
	for i in range(n,n - k,-1):
		ret *= i
	for i in range(k,1,-1):
		ret //= i
	return ret
C = {}
for i in range(ord('a'),ord('z') + 1):
	C[chr(i)] = int(input())
if C['h'] < 1 or C['e'] < 1 or C['l'] < 3 or C['o'] < 2 or C['w'] < 1 or C['r'] < 1 or C['d'] < 1:
	print(0)
else:
	ans = 1
	ans *= C['h'] * C['e'] * C['w'] * C['r'] * C['d']
	ans *= (C['o'] // 2) * (C['o'] - C['o'] // 2)
	m = 1
	for i in range(1,C['l'] // 2 + 1):
		m = max(m,nCk(C['l'] - i,2) * i)
	print(ans * m)