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

Ex Input:
Sentence: 'the dog lies inside a purple and white collapsable chair'. Replace the letter 'n' with 'j' in the sentence.

Ex Output:
the dog lies ijside a purple ajd white collapsable chair


Ex Input:
Sentence: 'a painting of scissors going to cut a chain with a lock'. Replace the letter 'g' with 'v' in the sentence.

Ex Output:
a paintinv of scissors voinv to cut a chain with a lock


Ex Input:
Sentence: 'two bears relaxing in a pond side by side'. Replace the letter 'd' with 'p' in the sentence.

Ex Output:

two bears relaxing in a ponp sipe by sipe