In this task, you need to count the number of words in a sentence that contain the given letter
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Question: Sentence: 'young girls with backpacks are standing near stairs that look to go to the subway'. How many words contain the letter 'r' in the sentence.

Answer: 4


Question: Sentence: 'a person that is fixing a pillow on a couch'. How many words contain the letter 's' in the sentence.

Answer: 2


Question: Sentence: 'a man kiteboarding in the water at the beach'. How many words contain the letter 'z' in the sentence.

Answer:
0