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 mirror a sink a toilet  and a blue basket'. How many words start with the letter 'a' in the sentence.
5

Sentence: 'a living room with a computer desk and a laptop'. How many words start with the letter 'l' in the sentence.
2

Sentence: 'a zebra and a boar running in a field'. How many words start with the letter 'f' in the sentence.

1