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

Ex Input:
Sentence: 'a white biplane on grassy area next to buildings'. How many words contain the letter 'g' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'bus moving through parking lot in front of building'. How many words contain the letter 'g' in the sentence.

Ex Output:
4

Ex Input:
Sentence: 'a woman catching a frisbee with her head'. How many words contain the letter 'c' in the sentence.

Ex Output:
1