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

Ex Input:
Sentence: 'a couple of giraffe standing next to each other near  a fence'. Replace the letter 'f' with 'j' in the sentence.

Ex Output:
a couple oj girajje standing next to each other near  a jence


Ex Input:
Sentence: 'the living room is designed with brown and beige colors'. Replace the letter 'i' with 'b' in the sentence.

Ex Output:
the lbvbng room bs desbgned wbth brown and bebge colors


Ex Input:
Sentence: 'an oddly tied tie on a pink shirt'. Replace the letter 'i' with 'a' in the sentence.

Ex Output:

an oddly taed tae on a pank shart