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

[EX Q]: Sentence: 'a beautiful old clock tower in a citys historic district'. How many words contain the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a stir fry consisting of rice broccoli and other vegetables'. How many words contain the letter 'e' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'jockeys and their horses racing on a beach'. How many words contain the letter 'z' in the sentence.
[EX A]:
0