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

Ex Input:
Sentence: 'a line of portable toilets stands outdoors under trees'. How many words contain the letter 'l' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'two males and a drink a laptop and a cellphone'. How many words contain the letter 'b' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a table filled with many assorted food items'. How many words contain the letter 'u' in the sentence.

Ex Output:

0