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

[Q]: Sentence: 'a man herding brown colored animals with a dog'. How many words contain the letter 'z' in the sentence.
[A]: 0


[Q]: Sentence: 'a man holding a frisbee above a crowd of young men'. How many words contain the letter 'i' in the sentence.
[A]: 2


[Q]: Sentence: 'a bed in a bedroom sitting under a painting'. How many words contain the letter 'a' in the sentence.
[A]:
4