In this task, you need to replace a letter in the sentence with another given letter.

Input: Consider Input: Sentence: 'a spacious bedroom with tidy bed and sofa with cushions'. Replace the letter 'n' with 'c' in the sentence.

Output: a spacious bedroom with tidy bed acd sofa with cushiocs


Input: Consider Input: Sentence: 'people watching a kite being flown with a sky background'. Replace the letter 'a' with 'b' in the sentence.

Output: people wbtching b kite being flown with b sky bbckground


Input: Consider Input: Sentence: 'a car and a sign on a city street'. Replace the letter 'a' with 'y' in the sentence.


Output: y cyr ynd y sign on y city street