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

Ex Input:
Sentence: 'people walking down the sidewalk with no turn signs'. How many words contain the letter 'e' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a green blue and yellow boat sitting in a harbor'. How many words contain the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a girl throws a frisbee as another girl watches'. How many words contain the letter 'q' in the sentence.

Ex Output:

0