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

Ex Input:
Sentence: 'a woman surfer is on an ocean wave'. How many words contain the letter 's' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a man holding a tennis racquet on a tennis court'. How many words contain the letter 'w' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a man with a surfboard standing next to tree'. How many words contain the letter 'g' in the sentence.

Ex Output:

1