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

Ex Input:
Sentence: 'a sidewalk with a toilet laying on side with people in background'. How many words contain the letter 'o' in the sentence.

Ex Output:
4

Ex Input:
Sentence: 'two animals are walking along in a field'. How many words contain the letter 'y' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'an elephant walking around a desert area with trees blocking the view'. How many words contain the letter 'm' in the sentence.

Ex Output:
0