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

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

Output: 4


Input: Consider Input: Sentence: 'several ties hang from a bar in a closet'. How many words contain the letter 'e' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a child is flying a kite in this drawing'. How many words contain the letter 'a' in the sentence.


Output: 3