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: 'a man on a boat pets a dog in a life jacket'. How many words contain the letter 'b' in the sentence.

Answer: 1


Question: Sentence: 'a group of people holding kites walking on a beach'. How many words contain the letter 'x' in the sentence.

Answer: 0


Question: Sentence: 'a man in white jacket grinding rail on a snowboard'. How many words contain the letter 'w' in the sentence.

Answer:
2