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

Ex Input:
Sentence: 'a bunch of giraffe stand around on a dirt covered area'. Replace the letter 'e' with 'p' in the sentence.

Ex Output:
a bunch of giraffp stand around on a dirt covprpd arpa


Ex Input:
Sentence: 'a close up of a train on train tracks at night'. Replace the letter 'n' with 'm' in the sentence.

Ex Output:
a close up of a traim om traim tracks at might


Ex Input:
Sentence: 'a small toilet next to a brick wall'. Replace the letter 'w' with 'z' in the sentence.

Ex Output:

a small toilet next to a brick zall