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

Ex Input:
Sentence: 'man holding remote control for video game system'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a box filled with fresh fruit and vegetables'. How many words contain the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a person holding a large cell phone showing the screen'. How many words contain the letter 'u' in the sentence.

Ex Output:

0