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

Ex Input:
Sentence: 'a white plate of food including rice and vegetables with beef'. How many words contain the letter 'o' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a wooden bench sits leveled straight on a slanted ground'. How many words contain the letter 'l' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'the woman has a blue and white surf board'. How many words contain the letter 'f' in the sentence.

Ex Output:

1