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 refrigerator a white cabinet a microwave and some blue walls'. How many words start with the letter 'b' in the sentence.
[A]: 1


[Q]: Sentence: 'a bathroom with a toilet with a blue seat'. How many words start with the letter 'b' in the sentence.
[A]: 2


[Q]: Sentence: 'a modern all white bathroom with a large mirror'. How many words start with the letter 'w' in the sentence.
[A]:
2