import functools

def comb(n, r):
    denom = functools.reduce(lambda x,y: x*y, [i for i in range(n-r+1,n+1)])
    numer = functools.reduce(lambda x,y: x*y, [i for i in range(1,r+1)])
    return denom // numer

alpha = [int(input()) for i in range(ord("z")-ord("a")+1)]

h = alpha[ord("h")-ord("a")]
e = alpha[ord("e")-ord("a")]
l = alpha[ord("l")-ord("a")]
o = alpha[ord("o")-ord("a")]
w = alpha[ord("w")-ord("a")]
r = alpha[ord("r")-ord("a")]
d = alpha[ord("d")-ord("a")]

total = h*e*w*r*d

if o > 2:
    total *= ((o-2)//2+1) * (o-2-((o-2)//2)+1)
elif o == 2:
    pass
else:
    total *= 0

if l > 3:
    max_l = 3
    for i in range((l-3)+1):
        tmp = comb(2+i, 2) * (l-3-i+1)
        if tmp > max_l:
            max_l = tmp
    total *= max_l
elif l == 3:
    pass
else:
    total *= 0

print(total)