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 man wearing a straw hat and a black shirt'. How many words start with the letter 'a' in the sentence.
4

Sentence: 'a man eating a giant slice of pizza over a table'. How many words start with the letter 'o' in the sentence.
2

Sentence: 'handmade toy bed and nightstand and small pink bear'. How many words start with the letter 'n' in the sentence.

1