#!/usr/bin/env python3

import string


ALPHAS = string.ascii_lowercase
NUM_ALPHAS = len(ALPHAS)


def helloworld_num(ctr):
    res = ctr["h"] * ctr["e"] * ctr["w"] * ctr["r"] * ctr["d"]
    res *= ctr["o"] // 2
    res *= ctr["o"] - ctr["o"] // 2
    n = ctr["l"]
    res *= max(x * (x - 1) * (n - x) // 2 for x in range(n + 1))
    return res


def main():
    ctr = dict(zip(ALPHAS, (int(input()) for _ in range(NUM_ALPHAS))))
    print(helloworld_num(ctr))


if __name__ == '__main__':
    main()