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 group of boats floating in the ocean next to a dirty walkway'. How many words start with the letter 't' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a man skateboarding down a rail next to a building'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a man that is jumping in the air with a skateboard'. How many words start with the letter 'a' in the sentence.
[EX A]:
3