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

Ex Input:
Sentence: 'a pizza sitting on top of a black cutting board'. How many words contain the letter 'g' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a woman surfer is on an ocean wave'. How many words contain the letter 's' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'we are looking at a herd of goats'. How many words contain the letter 'n' in the sentence.

Ex Output:

1