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

Ex Input:
Sentence: 'the street corner is flooded deep with water'. How many words contain the letter 'f' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'people walking down the sidewalk with no turn signs'. How many words contain the letter 'e' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a baseball player standing next to a baseball base on a field'. How many words contain the letter 'z' in the sentence.

Ex Output:

0