C=[int(input()) for i in range(26)]

S="hewrd"

ANS=1

for s in S:
    x=C[ord(s)-97]
    ANS*=x

x=C[ord("o")-97]
k=x//2
ANS*=k*(x-k)

x=C[ord("l")-97]

MAX=0
for i in range(x+1):
    MAX=max(MAX,i*(i-1)//2*(x-i))

print(ANS*MAX)