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 man serves the ball during a claycourt tennis match'. How many words start with the letter 'm' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a group of kites flying before a big blue sky'. How many words start with the letter 'b' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'two men are playing wii together in the living room'. How many words start with the letter 'a' in the sentence.
[EX A]:
1