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 green mail box sitting next to a white brick building'. How many words start with the letter 'b' in the sentence.
3

Sentence: 'a man wiping out on a surfboard on a wave'. How many words start with the letter 'o' in the sentence.
3

Sentence: 'a person with a hoodie on looking at a laptop'. How many words start with the letter 'l' in the sentence.

2