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

Ex Input:
Sentence: 'man and woman wearing all red standing in a snowy field'. How many words contain the letter 'k' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a large field is next to a river'. How many words contain the letter 'j' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a cat is sitting in a crib while a little child sleeps'. How many words contain the letter 'n' in the sentence.

Ex Output:

2