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

Ex Input:
Sentence: 'two motorcycle riders pose with motorcycles in front of a brick building'. How many words contain the letter 'c' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a modern looking bathroom has a toilet and a sink'. How many words contain the letter 'o' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'an outside look of a very quiet street with no people or traffic'. How many words contain the letter 's' in the sentence.

Ex Output:

2