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.

[EX Q]: Sentence: 'a door is closed with a sign on it glass cover'. How many words start with the letter 'a' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a large bathroom with double sinks and a walk in shower'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a laptop and some computers on a desk'. How many words start with the letter 'd' in the sentence.
[EX A]:
1