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: 'the two images show a bathroom sink and a stool beside a toilet'. How many words start with the letter 'a' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'this is a girl brushing her hair with a comb'. How many words start with the letter 'w' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a juvenile zebra is seen among the tall grass'. How many words start with the letter 'i' in the sentence.
[EX A]:
1