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 stop sign and a no stopping sign are on a street corner'. How many words start with the letter 's' in the sentence.
5

Sentence: 'this is an image of a group of people in a city'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a woman holding a cake on a counter top with a boy sitting nearby'. How many words start with the letter 'w' in the sentence.

2