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 dog on one side of a glass door and a cat on the other side'. How many words start with the letter 'a' in the sentence.
[A]: 4


[Q]: Sentence: 'stuffed monkey surrounded by bananas with a bunch on his head'. How many words start with the letter 'b' in the sentence.
[A]: 3


[Q]: Sentence: 'there are two men in a office playing a video game'. How many words start with the letter 'i' in the sentence.
[A]:
1