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

Ex Input:
Sentence: 'a large pizza smothered in cheese and sauce'. How many words contain the letter 'a' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a laptop computer that is sitting on a desk'. How many words contain the letter 't' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'simulation of a man in a suit on skis with his arms in the air'. How many words contain the letter 'z' in the sentence.

Ex Output:

0