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

Ex Input:
Sentence: 'a man sits on a bench with a dog in lap reading'. How many words contain the letter 'x' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'an lshaped desk covered in various computers and accessories'. How many words contain the letter 'e' in the sentence.

Ex Output:
5

Ex Input:
Sentence: 'two ducks that are by a nest in front of a pond'. How many words contain the letter 'o' in the sentence.

Ex Output:
4