In this task, you need to count the number of words in a sentence that start with the given letter. Answer with numbers and not words.

Q: Sentence: 'a picture of a very clean bed in the room'. How many words start with the letter 'r' in the sentence.

A: 1
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Q: Sentence: 'a lone zebra standing in the middle of a field'. How many words start with the letter 'i' in the sentence.

A: 1
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Q: Sentence: 'a us air force sitting on a runway near a field'. How many words start with the letter 'a' in the sentence.

A:
4
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