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 train moves across a train crossing in a city'. How many words start with the letter 'c' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a kitchen scene complete with a refrigerator sink and oven'. How many words start with the letter 's' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a vase is shown with red flowers inside'. How many words start with the letter 'i' in the sentence.
[EX A]:
2