a = {}
26.times{|i|a[('a'.ord+i).chr]=gets.to_i}
ans = a['h'] * a['e'] * a['w'] * a['r'] * a['d']
ans *= (a['o']/2) * (a['o']-a['o']/2)
mx = 0
z = a['l']
0.upto(z){|i|
  mx = [mx, i*(i-1)/2*(z-i)].max
}
ans *= mx
p ans