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

Input: Consider Input: Sentence: 'an orange cat is lounging on a gray couch'. How many words contain the letter 'c' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'some elephants in a field of grass near a tree'. How many words contain the letter 'k' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a kite on on the ground on a grassy field'. How many words contain the letter 'o' in the sentence.


Output: 4