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

Ex Input:
Sentence: 'some people standing around a line of tennis courts'. How many words contain the letter 'c' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'two giraffes with their heads in the tree'. How many words contain the letter 'o' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a river filled with lots of small white boats'. How many words contain the letter 'f' in the sentence.

Ex Output:

2