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

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: 'three laptops are turned on lined up on a table'. Replace the letter 't' with 'g' in the sentence.

Ex Output:
ghree lapgops are gurned on lined up on a gable


Ex Input:
Sentence: 'a man in a light blue shirt surfing under a large wave'. Replace the letter 'u' with 'i' in the sentence.

Ex Output:

a man in a light blie shirt sirfing inder a large wave