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

Ex Input:
Sentence: 'a living room with an orange couch and green decorations'. Replace the letter 'c' with 'm' in the sentence.

Ex Output:
a living room with an orange moumh and green demorations


Ex Input:
Sentence: 'a box of a dozen doughnuts all varieties'. Replace the letter 'l' with 'i' in the sentence.

Ex Output:
a box of a dozen doughnuts aii varieties


Ex Input:
Sentence: 'a couple of giraffe standing next to each other'. Replace the letter 't' with 'c' in the sentence.

Ex Output:

a couple of giraffe scanding nexc co each ocher