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 cat sitting on a pan in an oven'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a bathroom mirror reflecting a sink and bathtub'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a woman holding her hand over a wood fence towards two horses'. How many words start with the letter 'h' in the sentence.

4