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 laptop and some computers on a desk'. How many words start with the letter 'd' in the sentence.

A: 1
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Q: Sentence: 'a picture of a zebra that is walking in the grass'. How many words start with the letter 'z' in the sentence.

A: 1
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Q: Sentence: 'one pizza is fully eaten while other pizzas still have slices left'. How many words start with the letter 'o' in the sentence.

A:
2
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