Reduce the list. Postcodes starting with:

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Postcodes (64 items):
R0A (1)
R0B (1)
R0C (1)
R0E (1)
R0G (1)
R0H (1)
R0J (1)
R0K (1)
R0L (1)
R0M (1)
R1A (1)
R1B (1)
R1N (1)
R2C (1)
R2E (1)
R2G (1)
R2H (1)
R2J (1)
R2K (1)
R2L (1)
R2M (1)
R2N (1)
R2P (1)
R2R (1)
R2V (1)
R2W (1)
R2X (1)
R2Y (1)
R3A (1)
R3B (1)
R3C (1)
R3E (1)
R3G (1)
R3H (1)
R3J (1)
R3K (1)
R3L (1)
R3M (1)
R3N (1)
R3P (1)
R3R (1)
R3S (1)
R3T (1)
R3V (1)
R3W (1)
R3X (1)
R3Y (1)
R4A (1)
R4H (1)
R4J (1)
R4K (1)
R4L (1)
R5A (1)
R5G (1)
R5H (1)
R6M (1)
R6W (1)
R7A (1)
R7B (1)
R7C (1)
R7N (1)
R8A (1)
R8N (1)
R9A (1)