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

Ex Input:
Sentence: 'a child is lighting candles on a cake'. How many words contain the letter 't' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a bunch of people in a big field filled with bananas'. How many words contain the letter 'r' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a blue and red tour bus standing by a building with a tile roof'. How many words contain the letter 'f' in the sentence.

Ex Output:

1