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: 'adults with helmets sitting on tricycles made for children'. How many words contain the letter 'r' in the sentence.

Answer: 3


Question: Sentence: 'a man sanding next to a cow in a pen'. How many words contain the letter 'h' in the sentence.

Answer: 0


Question: Sentence: 'a boat is floating on a lake surrounded by mountains with glaciers'. How many words contain the letter 'w' in the sentence.

Answer:
1