# 5.9:  Starting with this list of non-unique values:

cities = ['Boston', 'Chicago', 'New York', 'Boston', 'Chicago',
          'Boston']

# Count the occurrence of each value in the list by compiling a count of cities in the dict:  store
# the city as a key in the dict and set or increment an integer count for the number of times that
# city occurred.  However, don't attempt to loop through the list more than once.  Hint:  as your
# loop encounters each element in the list, use the in membership test to see if the value is a key
# in the dict.  If it isn't, add it as a key with a value of 0.  Then, still in the block, and
# whether or not it is in the dict, add one to the value for that key, and assign the new +1 value
# back to the dict for that key.

# Expected Output:

# {'Boston': 3, 'Chicago': 2, 'New York': 1}

