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

Ex Input:
Sentence: 'a large clock mounted in the face of a building'. How many words contain the letter 'e' in the sentence.

Ex Output:
4


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 giraffe standing near the fence of an enclosure'. How many words contain the letter 'o' in the sentence.

Ex Output:

2