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 young man in a suit looks down and adjusts his tie'. How many words start with the letter 'a' in the sentence.
4

Sentence: 'a grey cat starring at a hand with a donut'. How many words start with the letter 'a' in the sentence.
4

Sentence: 'a tropical bird on a tree with a nut in its mouth'. How many words start with the letter 'm' in the sentence.

1