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

Ex Input:
Sentence: 'large stuffed toy bear sitting next to tree with assortment of bagged items'. Replace the letter 'y' with 'u' in the sentence.

Ex Output:
large stuffed tou bear sitting next to tree with assortment of bagged items


Ex Input:
Sentence: 'a guy looking at a tennis ball with a goofy look'. Replace the letter 'a' with 'x' in the sentence.

Ex Output:
x guy looking xt x tennis bxll with x goofy look


Ex Input:
Sentence: 'a computer and keyboard are on a computer desk'. Replace the letter 'k' with 'c' in the sentence.

Ex Output:

a computer and ceyboard are on a computer desc