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

Input: Consider Input: Sentence: 'a teddy bear that is sitting up on the ground'. How many words contain the letter 'm' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'looking out a window at a tall building with a clock on the face'. How many words contain the letter 'l' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'an orange cat lies curled up on some fabric'. How many words contain the letter 'n' in the sentence.


Output: 3