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

[EX Q]: Sentence: 'a horse and a donkey stand in a fenced field'. How many words contain the letter 'd' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'a couple is fast asleep at 3 in the morning'. How many words contain the letter 'y' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'the bathroom has a dual sink with mirrors over both'. How many words contain the letter 'l' in the sentence.
[EX A]:
1