import string
import sys


def input(): return sys.stdin.readline().rstrip()


def main():
    C = {}
    for i in string.ascii_lowercase:
        C[i] = int(input())

    def calc3(x):
        return max((i*(i-1)//2*(x-i) for i in range(0, x+1)))

    def calc2(x):
        return max((i*(x-i) for i in range(0, x+1)))

    print(C['h']*C['e']*calc3(C['l'])*calc2(C['o'])*C['w']*C['r']*C['d'])


if __name__ == '__main__':
    main()