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

Ex Input:
Sentence: 'he wants everyone to know that he has serious intentions for the tennis game'. How many words contain the letter 'h' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'trash cans and a fire hydrant are on the curb of a sidewalk'. How many words contain the letter 'u' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a passenger bus that is pulling up to the side of the street'. How many words contain the letter 'v' in the sentence.

Ex Output:

0