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

Ex Input:
Sentence: 'a man buttering toast in his kitchen on the counter'. How many words contain the letter 'c' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'two hotdogs on with various toppings and a drink on a counter'. How many words contain the letter 'w' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a room with a television chair table and a lamp'. How many words contain the letter 'b' in the sentence.

Ex Output:

1