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 black bear walks in front of a tree in a forest'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a woman standing next to a surfboard at the ocean'. How many words start with the letter 't' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a small kitchen with green walls in a trailer'. How many words start with the letter 'a' in the sentence.
[EX A]:
2