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.

[Q]: Sentence: 'a car sitting on a train carriage on the tracks'. How many words start with the letter 'a' in the sentence.
[A]: 2


[Q]: Sentence: 'a lady has just about finished her plate with a knife'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'a man showing a small laptop type device'. How many words start with the letter 'a' in the sentence.
[A]:
2