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: 'a person eating a slice of pizza on a table'. How many words contain the letter 'z' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a nice bamboo plant with some other greenery'. How many words contain the letter 'k' in the sentence.

Ex Output:

0