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

Ex Input:
Sentence: 'a man sleeping on a park bench then a woman looks at another man with a newspaper over his face on another park bench'. How many words contain the letter 't' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a kitchen with a dining room table and a sitting area'. How many words contain the letter 'r' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'searching for autumn pictures on flickr using laptop'. How many words contain the letter 'u' in the sentence.

Ex Output:

3