Reduce the list. Postcodes starting with:

---

Postcodes (87 items):
KA1 (11)
KA10 (3)
KA11 (4)
KA12 (1)
KA13 (4)
KA14 (1)
KA15 (5)
KA16 (2)
KA17 (2)
KA18 (30)
KA19 (19)
KA2 (4)
KA20 (1)
KA21 (1)
KA22 (2)
KA23 (5)
KA24 (7)
KA25 (1)
KA26 (40)
KA27 (38)
KA28 (2)
KA29 (1)
KA3 (14)
KA30 (4)
KA4 (4)
KA5 (15)
KA6 (24)
KA7 (10)
KA8 (2)
KA9 (4)
KT1 (1)
KT10 (5)
KT11 (4)
KT12 (3)
KT13 (1)
KT14 (2)
KT15 (4)
KT16 (4)
KT17 (2)
KT18 (1)
KT19 (1)
KT2 (1)
KT20 (6)
KT21 (1)
KT22 (3)
KT23 (3)
KT24 (3)
KT3 (1)
KT4 (2)
KT5 (1)
KT6 (2)
KT7 (1)
KT8 (2)
KT9 (3)
KW1 (64)
KW10 (6)
KW11 (12)
KW12 (23)
KW13 (11)
KW14 (76)
KW15 (6)
KW16 (24)
KW17 (93)
KW2 (4)
KW3 (11)
KW5 (10)
KW6 (10)
KW7 (5)
KW8 (16)
KW9 (13)
KY1 (9)
KY10 (16)
KY11 (9)
KY12 (20)
KY13 (19)
KY14 (12)
KY15 (46)
KY16 (18)
KY2 (3)
KY3 (5)
KY4 (8)
KY5 (8)
KY6 (5)
KY7 (10)
KY8 (22)
KY9 (9)
KY99 (1)