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

Ex Input:
Sentence: 'a group of people on a beach flying a kite'. Replace the letter 'p' with 'i' in the sentence.

Ex Output:
a groui of ieoile on a beach flying a kite

Ex Input:
Sentence: 'a person flying a kite on the beach between some trees'. Replace the letter 's' with 'k' in the sentence.

Ex Output:
a perkon flying a kite on the beach between kome treek

Ex Input:
Sentence: 'two men on their laptops while listening to a speaker'. Replace the letter 'l' with 'v' in the sentence.

Ex Output:
two men on their vaptops whive vistening to a speaker