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

Ex Input:
Sentence: 'an image of a person holding a blunt object is rendered in red and blue tones'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a teenager and child are fighting for a frisbee'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a woman is playing tennis while people watch'. How many words contain the letter 'h' in the sentence.

Ex Output:

2