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 zeppelin flying in the air as a water spouts occurs in a city lake'. How many words start with the letter 'a' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'a police car driving by a construction truck'. How many words start with the letter 'b' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'two people holding surfboards over their heads and walking on the beach towards the ocean'. How many words start with the letter 't' in the sentence.
[EX A]:
5