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 glass vase with clear glass marbles in it and purple flowers coming out of the vase'. How many words contain the letter 'd' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a red motorcycle parked along a street near some small trees'. How many words contain the letter 'l' in the sentence.

Ex Output:

3