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

Ex Input:
Sentence: 'a sign asking for witnesses is posted in front of a destroyed home'. How many words contain the letter 'y' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'child standing in front of a stop sign on a suburban street corner'. How many words contain the letter 'u' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'bears laid out on the chair to look like theyve been drinking with wine glass and bottles'. How many words contain the letter 'l' in the sentence.

Ex Output:

5