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

Ex Input:
Sentence: 'a couple of zebras and antelopes captured on a wildlife camera'. How many words contain the letter 'm' in the sentence.

Ex Output:
1

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 train coming down the tracks on a sunny day'. How many words contain the letter 'u' in the sentence.

Ex Output:
1