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

Ex Input:
Sentence: 'a person eating a slice of pizza on a table'. How many words contain the letter 'z' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'little girl with her bunny beside her sitting on a bench'. How many words contain the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a group of people walking along the beach'. How many words contain the letter 'u' in the sentence.

Ex Output:

1