In this task, you need to count the number of words in a sentence that contain the given letter

Q: Sentence: 'a woman in a wheelchair is about to play tennis'. How many words contain the letter 'r' in the sentence.

A: 1
****
Q: Sentence: 'there are trains that are on the train track'. How many words contain the letter 'z' in the sentence.

A: 0
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Q: Sentence: 'a cute little white cat sitting on a keyboard'. How many words contain the letter 'b' in the sentence.

A:
1
****