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

Ex Input:
Sentence: 'bus parked next to a side walk on the road'. How many words contain the letter 'd' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a smiling  woman wearing a hat holds up a snowboard'. How many words contain the letter 'b' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a pizza sliced in half sitting on a cookie sheet'. How many words contain the letter 'y' in the sentence.

Ex Output:

0