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

Ex Input:
Sentence: 'some stop lights that are at an intersection'. How many words contain the letter 'c' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a group of people on skis on a snowy slope'. How many words contain the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a lot of people that are at a party'. How many words contain the letter 'y' in the sentence.

Ex Output:

1