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

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: 'chopsticks and oriental food in white dishes sit on a wooden table'. How many words contain the letter 'z' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a woman in a white dress and five men it suits posing on a bench for a picture'. How many words contain the letter 'c' in the sentence.

Ex Output:

2