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: 'the laptop is disassembled with the parts piled on the outer shell'. How many words contain the letter 'v' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a street sign knocked over and laying towards the street'. How many words contain the letter 'm' in the sentence.

Ex Output:

0