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

Ex Input:
Sentence: 'a giraffe biting into a tree branch with great ferocity'. How many words contain the letter 'z' 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: 'two women in an arena with a cow'. How many words contain the letter 'u' in the sentence.

Ex Output:

0