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

Ex Input:
Sentence: 'a man with baskets of goods stands next to his bicycle'. How many words contain the letter 'r' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'man holding remote control for video game system'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a pretty woman laying in bed with a bulldog under her pillows'. How many words contain the letter 'a' in the sentence.

Ex Output:

4