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: 'the train needs to be serviced so it is o the truck'. How many words contain the letter 'n' in the sentence.

Answer: 2


Question: Sentence: 'a long train is coming down some tracks'. How many words contain the letter 'w' in the sentence.

Answer: 1


Question: Sentence: 'the tall tower in the middle is framed by two large buildings'. How many words contain the letter 'a' in the sentence.

Answer:
3