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: 'this is a girl brushing her hair with a comb'. How many words start with the letter 'w' in the sentence.
1

Sentence: 'a brown teddy bear is sitting on plaid sheets'. How many words start with the letter 'p' in the sentence.
1

Sentence: 'four boats on the sand on the beach'. How many words start with the letter 'o' in the sentence.

2