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 rusty metal park bench in a park'. How many words start with the letter 'a' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a toddler looking up at a colorful kite in the sky'. How many words start with the letter 'c' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'two asian men standing next to a no smoking sign'. How many words start with the letter 's' in the sentence.
[EX A]:
3