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

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: 'some soldiers cutting into a big sheet cake on a table'. How many words contain the letter 'c' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'elephant playing with large ball in outdoor zoo enclosure'. How many words contain the letter 'x' in the sentence.

Ex Output:
0