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

Ex Input:
Sentence: 'a room with a bed, lamps, tables and pillows'. Replace the letter 's' with 'b' in the sentence.

Ex Output:
a room with a bed, lampb, tableb and pillowb


Ex Input:
Sentence: 'a seafood dish served over a bowl of white rice'. Replace the letter 'e' with 'u' in the sentence.

Ex Output:
a suafood dish survud ovur a bowl of whitu ricu


Ex Input:
Sentence: 'a plethora of traffic lights on a pole that looks like a tree of sorts'. Replace the letter 's' with 't' in the sentence.

Ex Output:

a plethora of traffic lightt on a pole that lookt like a tree of tortt