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

Ex Input:
Sentence: 'two children struggle over a bat in their playroom'. Replace the letter 't' with 'v' in the sentence.

Ex Output:
vwo children svruggle over a bav in vheir playroom


Ex Input:
Sentence: 'a group of giraffe standing on top of a dirt field'. Replace the letter 'a' with 'y' in the sentence.

Ex Output:
y group of giryffe stynding on top of y dirt field


Ex Input:
Sentence: 'a gang of motorcycle cops riding down a busy street'. Replace the letter 'o' with 'u' in the sentence.

Ex Output:

a gang uf muturcycle cups riding duwn a busy street