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

Ex Input:
Sentence: 'a microwaved broccoli and cheese dish and a spoon'. How many words contain the letter 'n' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a surfer in a black wet suit riding a wave in the ocean'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a little vehicle with open doors on each side and a ladder on the back'. How many words contain the letter 'u' in the sentence.

Ex Output:

0