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

Ex Input:
Sentence: 'a man srufing the waves on a board in front of 3 tall pillars'. How many words contain the letter 'n' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a cat in a tie sits on the couch'. How many words contain the letter 't' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'the cat is lying on top of the books on the shelf'. How many words contain the letter 'g' in the sentence.

Ex Output:

1