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 traffic light with a red light and an arrow pointing to the right'. How many words start with the letter 't' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a woman walking up to a double decker bus that has stopped'. How many words start with the letter 'w' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'two sheep grazing out in a pasture with tall grass'. How many words start with the letter 'a' in the sentence.
[EX A]:
1