def fact(x):
    if x == 0:
        return 1
    return x * fact(x - 1)


def combi(r, c):
    return fact(r) / fact(c) / fact(r - c)


def l_max(x):
    res = 0
    for i in range(2, x):
        res = max(res, combi(i, 2) * (x - i))
    return res

C = [input() for i in range(26)]
ans = 1
for i in map(lambda x: ord(x) - ord('a'), 'dehrw'):
    ans *= C[i]
x = C[ord('o') - ord('a')]
ans *= (x/2) * (x - x/2)
ans *= l_max(C[ord('l') - ord('a')])
if ans < 1:
    print(0)
else:
    print(ans)