Reduce the list. Postcodes starting with:

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Postcodes (84 items):
K0A (1)
K0B (1)
K0C (1)
K0E (1)
K0G (1)
K0H (1)
K0J (1)
K0K (1)
K0L (1)
K0M (1)
K1A (1)
K1B (1)
K1C (1)
K1E (1)
K1G (1)
K1H (1)
K1J (1)
K1K (1)
K1L (1)
K1M (1)
K1N (1)
K1P (1)
K1R (1)
K1S (1)
K1T (1)
K1V (1)
K1W (1)
K1X (1)
K1Y (1)
K1Z (1)
K2A (1)
K2B (1)
K2C (1)
K2E (1)
K2G (1)
K2H (1)
K2J (1)
K2K (1)
K2L (1)
K2M (1)
K2P (1)
K2R (1)
K2S (1)
K2T (1)
K2V (1)
K2W (1)
K4A (1)
K4B (1)
K4C (1)
K4K (1)
K4M (1)
K4P (1)
K4R (1)
K6A (1)
K6H (1)
K6J (1)
K6K (1)
K6T (1)
K6V (1)
K7A (1)
K7C (1)
K7G (1)
K7H (1)
K7K (1)
K7L (1)
K7M (1)
K7N (1)
K7P (1)
K7R (1)
K7S (1)
K7V (1)
K8A (1)
K8B (1)
K8H (1)
K8N (1)
K8P (1)
K8R (1)
K8V (1)
K9A (1)
K9H (1)
K9J (1)
K9K (1)
K9L (1)
K9V (1)