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

[EX Q]: Sentence: 'black and white photo of old man riding a motorcycle'. How many words contain the letter 'n' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a man in a suit with his finger in his ear'. How many words contain the letter 'm' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'the woman walking a dog is holding an umbrella'. How many words contain the letter 'e' in the sentence.
[EX A]:
2