def nC2(n):
    return n * (n - 1) // 2


N = 26

li = [chr(ord('a') + i) for i in range(N)]
c = [int(input()) for i in range(N)]

chrs = set("helloworld")
dic = {}

for x in chrs:
    dic[x] = c[ord(x) - ord('a')]

ans = 1
for x, n in dic.items():
    if x == 'l':
        if n < 3:
            print(0)
            exit()
        t = 1
        rest = n - 3
        for i in range(rest + 1):  # 余ったlをどう割り振るか
            t = max(t, nC2(i + 2) * (1 + rest - i))
        ans *= t
    elif x == 'o':
        if n < 2:
            print(0)
            exit()
        t = 1
        rest = n - 2
        for i in range(rest + 1):  # 余ったlをどう割り振るか
            t = max(t, (i + 1) * (1 + rest - i))
        ans *= t
    else:
        if n < 1:
            print(0)
            exit()
        ans *= n
print(ans)