from math import factorial


def comb(n, k):
    return factorial(n) // (factorial(k) * factorial(n - k))


def main():
    alp = dict()
    for i in range(26):
        alp[chr(i + 97)] = int(input())

    ans = 1
    for c in "hewrd":
        ans *= alp[c]
    o = alp['o']
    ans *= o // 2 * (o - o // 2)

    l = alp['l'] - 1
    n = 0
    for i in range(l - 1):
        n = max(n, comb(l - i, 2) * (i + 1))
    ans *= n

    print(max(0, ans))

    
if __name__ == '__main__':
    main()