WATCH & QUESTION: Slingerbos

In February 1953, there was a big storm and many dykes in the south-west of the Netherlands broke under the force of the pounding water. It also affected Brouwershaven. Three people died and the water left behind a mess. Money was needed for reconstruction and it came from the municipality of Voorburg (near The Hague). This municipality adopted the town and donated 50,000 guilders (about 23,000 euros in conversion). Buildings and streets were repaired, but much more happened. For instance, 92 pairs of socks were knitted and all 220 schoolchildren received a present. A memorial stone was placed in the renovated Slingerbos to remember this special adoption.
Question 2: Which municipality adopted Brouwershaven? Write down the 2nd letter.