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 young kid in a hat with a parrot on his shoulder'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a man riding on top of a wave on a surfboard'. How many words start with the letter 'o' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'pair of zebras walking past rocks in zoo enclosure'. How many words start with the letter 'e' in the sentence.
[EX A]:
1