def n(a):
    return ord(a)-ord('a')

def trip(n):
    if n <= 2:
        return 0
    ret = 0
    for i in range(2,n):
        ret = max(ret, (n-i)*i*(i-1)/2)
    return ret

ans=1
comb = [[0 for i in range(101)] for j in range (101)]
for i in range(101):
    comb[i][0]=1
    for j in range(1,i+1):
        comb[i][j] = comb[i-1][j-1]+comb[i-1][j]

cnt = [int(raw_input()) for i in range(26)]
print cnt[n('h')]*cnt[n('e')]*(cnt[n('o')]/2)*cnt[n('w')]*(cnt[n('o')]-cnt[n('o')]/2)*cnt[n('r')]*cnt[n('d')]*trip(cnt[n('l')])