Ivana-

# https://www.onlinegdb.com/online_python_interpreter#

'''
-- immutable, persistent, coinductive streams

ones = 1 : ones

fibs = 0 : 1 : zipWith (+) fibs (tail fibs)

hamm = 1 : map (*2) hamm `f` map (*3) hamm `f` map (*5) hamm where