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 bunch of tables in a hanger with an airplane overhead'. How many words start with the letter 'a' in the sentence.
[EX A]: 4

[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: 'mattress with covers sitting on rocking frame in empty room'. How many words start with the letter 'f' in the sentence.
[EX A]:
1