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.
--------
Question: Sentence: 'a boy waves at the camera standing on a tree stump'. How many words start with the letter 'a' in the sentence.

Answer: 3


Question: 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.

Answer: 2


Question: Sentence: 'there is a black motorcycle with an american flag on the back'. How many words start with the letter 'w' in the sentence.

Answer:
1