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

[Q]: Sentence: 'a teenager and child are fighting for a frisbee'. How many words contain the letter 'm' in the sentence.
[A]: 0


[Q]: Sentence: 'a white longheaired dog eating a birthday cake'. How many words contain the letter 'z' in the sentence.
[A]: 0


[Q]: Sentence: 'a man and woman sitting on top of a bench near the ocean'. How many words contain the letter 'b' in the sentence.
[A]:
1