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 cooking pancakes in the field'. How many words contain the letter 'g' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'people are parked along side the road by pay here signs'. How many words contain the letter 'a' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a very large fridge in a kitchen which is old'. How many words contain the letter 'd' in the sentence.

Ex Output:

2