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 scooter with a bag on it parked next to a pasture with two cows in it'. How many words start with the letter 'i' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a person walking on a street with a umbrella'. How many words start with the letter 's' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a man and woman are sitting at a table with a piece of cake'. How many words start with the letter 't' in the sentence.
[EX A]:
1