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 bathroom mirror reflecting a sink and bathtub'. How many words start with the letter 'a' in the sentence.

A: 3
****
Q: Sentence: 'a boy in a red baseball uniform throws a ball'. How many words start with the letter 'b' in the sentence.

A: 3
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Q: Sentence: 'group of people on rowboats in front of a mountain range'. How many words start with the letter 'f' in the sentence.

A:
1
****