In this task, you need to count the number of words in a sentence that contain the given letter

[Q]: Sentence: 'the jet is flying through the sky during the day'. How many words contain the letter 'i' in the sentence.
[A]: 3


[Q]: Sentence: 'a train that is pulling into the station'. How many words contain the letter 't' in the sentence.
[A]: 5


[Q]: Sentence: 'a young child riding on the back of a horse'. How many words contain the letter 's' in the sentence.
[A]:
1