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

Ex Input:
Sentence: 'man and woman posing for picture before prom'. How many words contain the letter 'c' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a bed has an empty bag and folded laundry stacked on it'. How many words contain the letter 'm' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a small child is learning to ride a white horse'. How many words contain the letter 'z' in the sentence.

Ex Output:

0