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.

Sentence: 'a black and white cat is sitting on the bathroom sink'. How many words start with the letter 'i' in the sentence.
1

Sentence: 'a closeup picture of a polar bears head'. How many words start with the letter 'a' in the sentence.
2

Sentence: 'a man is wearing a sign around his neck that says billshrink'. How many words start with the letter 'b' in the sentence.

1