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

Ex Input:
Sentence: 'an old motorcycle with the seat missing parked in a garage with other parts and motorcycles'. How many words contain the letter 'r' in the sentence.

Ex Output:
6


Ex Input:
Sentence: 'computer and a monitor on a wooden desk next to a laptop'. How many words contain the letter 'm' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a boat is next to a field for picking up people'. How many words contain the letter 'y' in the sentence.

Ex Output:

0