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

Ex Input:
Sentence: 'a smiling  woman wearing a hat holds up a snowboard'. How many words contain the letter 'b' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a bearded man sits on a couch with an electronic device in his hand'. How many words contain the letter 'e' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a busy city street with cars and pedestrians'. How many words contain the letter 'r' in the sentence.

Ex Output:

3