def lscan; gets.split.map(&:to_i); end

a,b = lscan.map(&:to_r)
aa = a
# bb = (q/2)**2 + (q/2)**2
bb = b/2


p a  < b/2 ? 0 :
  a == b/2 ? 4 :
  a  < b   ? 8 :
  a == b   ? 4 : 0