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

Ex Input:
Sentence: 'two people riding on the back of a large elephant'. How many words contain the letter 't' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a group of people cooking pancakes in the field'. How many words contain the letter 'g' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a man is skiing on a steep snowy mountain'. How many words contain the letter 's' in the sentence.

Ex Output:

4