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

Ex Input:
Sentence: 'man in blue shirt hitting a tennis ball back'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a glass vase with clear glass marbles in it and purple flowers coming out of the vase'. How many words contain the letter 'd' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a  piece of cake on a flowered plate'. How many words contain the letter 'l' in the sentence.

Ex Output:

2