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

Ex Input:
Sentence: 'the teddy bears are posed to sit at the toy picnic table'. How many words contain the letter 'v' in the sentence.

Ex Output:
0


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 baseball player kneeling down on a baseball field'. How many words contain the letter 'v' in the sentence.

Ex Output:

0