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

Ex Input:
Sentence: 'two hotdogs on with various toppings and a drink on a counter'. How many words contain the letter 'w' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'the black bears are together on the rocks eating outside'. How many words contain the letter 'y' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'two pictures of the same cat on the floor with a toy'. How many words contain the letter 's' in the sentence.

Ex Output:
2