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

Ex Input:
Sentence: 'a rack full of clothes in a small bedroom'. How many words contain the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a girl sitting on a bench holding a flower'. How many words contain the letter 'p' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a snowboard rider takes a jump and grabs his board'. How many words contain the letter 'm' in the sentence.

Ex Output:

1