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


ans = 1
for s in "hewrd":
    ans *= C[ord(s)-ord("a")]

Co = C[ord("o")-ord("a")]
ans *= Co//2*(Co+1)//2
Cl = C[ord("l")-ord("a")]
m = 0
for i in range(2,Cl):
    cal = i*(i-1)//2*(Cl-i)
    m = max(m,cal)
print(ans*m)