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

Ex Input:
Sentence: 'a young man dressed as a nun skateboards down the street'. How many words contain the letter 'e' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'fresh daisies in a rectangular green glass vase'. How many words contain the letter 's' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a bathroom mirror sitting above a counter near a doorway'. How many words contain the letter 'u' in the sentence.

Ex Output:

1