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

Ex Input:
Sentence: 'a person standing in the kitchen with an object in hand'. How many words contain the letter 't' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a teenager and child are fighting for a frisbee'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'the woman in the classroom hold the box of donuts'. How many words contain the letter 'x' in the sentence.

Ex Output:

1