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

Ex Input:
Sentence: 'a group of people on a beach beneath a cloudy sky'. How many words contain the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'group of kids play frisbee golf in the middle of the woods'. How many words contain the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a double decker bus drives down the street'. How many words contain the letter 'u' in the sentence.

Ex Output:

2