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A Canadian postal code is a six-character alphanumeric string that represents a part of a postal address. They are in the format of A1A 1A1, where A could be any letter and 1 could be any number from 0-9. Given an unsorted list of postal codes, write a Python program, in a file call postal.py, to sort the list of postal codes (actually modify the given list into a sorted list) and then display the sorted postal codes such that each postal code with the same starting letter is printed on the same line, with each line in alphabetical order. Note that the postal codes can be in any order on the same line, as long as they all start with the same letter, or you can have them sorted on the line as well. For example, given the following list of postal codes: postal_codes = ['A1A 1A1', 'B3K 5X5', 'V9A 7N2', 'A0Z 6P7', 'H0H 0H0', 'A1B 1T0'] The output would be similar to: Sorted postal codes: A0Z 6P7 A1A 1A1 A1B 1T0 B3K 5X5 H0H 0H0 V9A 7N2 Note: You are not permitted to use the sort() method.
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