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

Input: Consider Input: Sentence: 'a back pack and lap top sit on the kitchen counter'. Replace the letter 't' with 'k' in the sentence.

Output: a back pack and lap kop sik on khe kikchen counker

Input: Consider Input: Sentence: 'a couch, footrest, tv and other furniture are arranged in a living room'. Replace the letter 'o' with 'g' in the sentence.

Output: a cguch, fggtrest, tv and gther furniture are arranged in a living rggm

Input: Consider Input: Sentence: 'a family hangs out on a wooden porch'. Replace the letter 't' with 'u' in the sentence.
Output: a family hangs ouu on a wooden porch