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

Ex Input:
Sentence: 'a young man standing in front of a laptop computer'. How many words contain the letter 'y' in the sentence.

Ex Output:
1


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 group of boys and girls playing soccer against each other'. How many words contain the letter 'i' in the sentence.

Ex Output:

3