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

[EX Q]: Sentence: 'ther e is a commuter train that is coming on the tracks'. How many words contain the letter 'r' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a man in a helmet leans on his motorcycle'. How many words contain the letter 'n' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a man on a cellphone sitting on the edge of a stone column'. How many words contain the letter 'q' in the sentence.
[EX A]:
0