create a python function called Filter which takes as parameters a list of numbers and a number and returns a new list containing only those elements from the original list which are less than the provided number.

for instance

filter ( [ 1 , 4, 2, 3,6,5],4 ) returns [ 1, 2, 3]

and

filter ( [ 1, 2, 10, 1, 2], 2 ) returns [1, 1]