Write a function named counter_dict that takes input a list. * returns a dictionary whose keys are the set of elements of the input list and the values are number of occurences of that key in the input list. For example, if the input list is ['Paris', 'London', 'Moscow', 'London', 'Helsinki', 'London', 'Paris'] the counter_dict function should return {'Paris': 2, 'London': 3, 'Helsinki': 1, 'Moscow'; 1). Notes: Of course, ordering of the items in the dictionary is not important. [5]: my_travels = ['Paris', 'London', 'Moscow', 'London', 'Helsinki', 'London' -, 'Paris'] def counter_dict (input): # Do the job here pass #Call the function and see if it works counter_dict (my_travels)