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: 'people standing in a river surrounding an elephant some are touching it'. How many words contain the letter 'd' in the sentence.

Answer: 2


Question: Sentence: 'a woman is hitting a tennis ball with her racket'. How many words contain the letter 'c' in the sentence.

Answer: 1


Question: Sentence: 'ther e is a commuter train that is coming on the tracks'. How many words contain the letter 'r' in the sentence.

Answer:
4