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

Ex Input:
Sentence: 'a white cat looking in a rectangular mirror in a female bedroom'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a big sign that is lit up near some buildings'. How many words contain the letter 'r' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'the facades of the buildings in the row are all the same'. How many words contain the letter 'f' in the sentence.

Ex Output:

2