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

Ex Input:
Sentence: 'a black sign that is standing in the grass'. How many words contain the letter 'f' in the sentence.

Ex Output:
0


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: 'two computer monitors are sitting side by side on the desk'. How many words contain the letter 'h' in the sentence.

Ex Output:

1