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 man standing over a sheet cake on top of a table'. How many words start with the letter 's' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'woman sitting at top of stairs talking on phone and smoking a cigarette'. How many words start with the letter 's' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'cars and a motorcycle waiting at an intersection'. How many words start with the letter 'a' in the sentence.
[EX A]:
4