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

Ex Input:
Sentence: 'a small bird perched on a open window'. Replace the letter 'e' with 'r' in the sentence.

Ex Output:
a small bird prrchrd on a oprn window


Ex Input:
Sentence: 'an airplane moves through the skies above a snowy mountain range'. Replace the letter 'l' with 's' in the sentence.

Ex Output:
an airpsane moves through the skies above a snowy mountain range


Ex Input:
Sentence: 'a computer has man folders open on a desk'. Replace the letter 'c' with 'e' in the sentence.

Ex Output:

a eomputer has man folders open on a desk