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 bus and a truck are pictured driving on a street'. How many words start with the letter 'a' in the sentence.
5

Sentence: 'a take out sandwich and two bottles of soda'. How many words start with the letter 'a' in the sentence.
2

Sentence: 'a young man riding a skateboard at a skate park'. How many words start with the letter 'm' in the sentence.

1