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

Ex Input:
Sentence: 'a man buttering toast in his kitchen on the counter'. How many words contain the letter 'c' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'a brown bear standing next to a giant rock'. How many words contain the letter 'j' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'a very big nice looking kitchen that is well lit'. How many words contain the letter 'r' in the sentence.

Ex Output:
1