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 skier skiing on the mountain with trees behind him'. How many words contain the letter 'z' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a young woman horseback riding with her friends'. How many words contain the letter 'h' in the sentence.
[EX A]:
3