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

Ex Input:
Sentence: 'a white pickup truck thats parked on the corner of an intersection'. How many words contain the letter 'v' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'watchful raptor standing on one foot on a rock pile'. How many words contain the letter 'r' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'three people on a beach one is flying a kite'. How many words contain the letter 'k' in the sentence.

Ex Output:

1