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: 'some black birds sitting on some rocks and some water'. How many words start with the letter 'b' in the sentence.

A: 2
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Q: Sentence: 'colorful flowers in a metal vase sitting on a mirror ledge'. How many words start with the letter 'c' in the sentence.

A: 1
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Q: Sentence: 'a couple of people are playing video games on a coach'. How many words start with the letter 'g' in the sentence.

A:
1
****