In this task, you need to count the number of words in a sentence that contain the given letter

[Q]: Sentence: 'a toilet sits in the middle of a street'. How many words contain the letter 'b' in the sentence.
[A]: 0

[Q]: Sentence: 'an elephant near a man sitting down'. How many words contain the letter 'y' in the sentence.
[A]: 0

[Q]: Sentence: 'there are some white cows walking in deep water'. How many words contain the letter 'b' in the sentence.
[A]:
0