In this task, you need to count the number of words in a sentence that start with the given letter. Answer with numbers and not words.

[EX Q]: Sentence: 'a train passes over a quiet city park on a bridge'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a living room with a computer desk and a laptop'. How many words start with the letter 'l' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'one way sign in front of a building with a painting of someone pointing on the block'. How many words start with the letter 'w' in the sentence.
[EX A]:
2