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 person flying through the air on the kite board'. Replace the letter 'h' with 'l' in the sentence.

Ex Output:
a person flying tlrougl tle air on tle kite board


Ex Input:
Sentence: 'a tree is next to a stop sign'. Replace the letter 's' with 'v' in the sentence.

Ex Output:

a tree iv next to a vtop vign