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 person takes a picture of a reflection in a mirror in the dark'. How many words start with the letter 'p' in the sentence.
2

Sentence: 'an elephant standing in front of some trees with its trunk in the air'. How many words start with the letter 's' in the sentence.
2

Sentence: 'a group of four motor boats on the water'. How many words start with the letter 'o' in the sentence.

2