# your code goes here

import re

postalCode = " 123 4th Street, Toronto, Ontario, M1A 1A1 "

#read First Line
line = postalCode

if re.search("[ABCEGHJKLMNPRSTVXY][0-9][ABCEGHJKLMNPRSTVWXYZ] ?[0-9][ABCEGHJKLMNPRSTVWXYZ][0-9]", line):
	print 'Match found - valid Canadian address: ', line
else:
	print 'Error - no match - invalid Canadian address:', line