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

Ex Input:
Sentence: 'a bird flying over the water in the ocean shore'. How many words contain the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'the children are playing on the beach  next to the water'. How many words contain the letter 'h' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a room in a house is uniquely decorated'. How many words contain the letter 'x' in the sentence.

Ex Output:

0