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 man in a suit with his finger in his ear'. How many words contain the letter 'm' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'several people are sailing their boats on a lake'. How many words contain the letter 'n' in the sentence.

Ex Output:

2