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

Ex Input:
Sentence: 'a black sign that is standing in the grass'. How many words contain the letter 'f' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'three people that are looking at a monitor on the left side of the photo'. How many words contain the letter 'd' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a stove top with a tea kettle underneath a glass and wood set of cabinets'. How many words contain the letter 'j' in the sentence.

Ex Output:

0