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: 'four white and blue street signs on a wooden pole'. How many words contain the letter 'u' in the sentence.

Answer: 2


Question: Sentence: 'a fresh flower on a table in a piture of water'. How many words contain the letter 'n' in the sentence.

Answer: 2


Question: Sentence: 'a man is holding onto a kite on the beach'. How many words contain the letter 'a' in the sentence.

Answer:
4