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

Q: Sentence: 'a stop sign casting a shadow of a sign that says war'. How many words contain the letter 'y' in the sentence.

A: 1
****
Q: Sentence: 'people holding a surfboard and walking down the beach'. How many words contain the letter 'n' in the sentence.

A: 4
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Q: Sentence: 'a boat in the middle of a river on a sunny day'. How many words contain the letter 'u' in the sentence.

A:
1
****