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

Ex Input:
Sentence: 'unusual round vase with flower stems inside it'. How many words contain the letter 'c' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a blue motorcycle parked next to a tree in a forest'. How many words contain the letter 'm' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a brown couch a white clock a red couch and some windows'. How many words contain the letter 'x' in the sentence.

Ex Output:

0