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

Ex Input:
Sentence: 'bananas, oranges and apples are in shades of yellow and orange'. Replace the letter 'r' with 'b' in the sentence.

Ex Output:
bananas, obanges and apples abe in shades of yellow and obange


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 blue vase with pink and white flowers'. Replace the letter 'h' with 'i' in the sentence.

Ex Output:

a blue vase witi pink and wiite flowers