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

Ex Input:
Sentence: 'a bed has an empty bag and folded laundry stacked on it'. How many words contain the letter 'm' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'chopsticks and oriental food in white dishes sit on a wooden table'. How many words contain the letter 'z' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a kitchen counter with three coffee mugs waiting to be filled'. How many words contain the letter 'q' in the sentence.

Ex Output:

0