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

Ex Input:
Sentence: 'a woman standing in the dirt looking up at an elephant'. How many words contain the letter 'b' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'the children are playing on the beach  next to the water'. How many words contain the letter 'h' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a video game controller that is placed on a table'. How many words contain the letter 'l' in the sentence.

Ex Output:

3