TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a room with a bed, lamps, tables and pillows'. Replace the letter 's' with 'b' in the sentence.

SOLUTION: a room with a bed, lampb, tableb and pillowb

PROBLEM: Sentence: 'vintage cartoon elephant and cartoon dog paper tags'. Replace the letter 'p' with 'r' in the sentence.

SOLUTION: vintage cartoon elerhant and cartoon dog rarer tags

PROBLEM: Sentence: 'surfer riding under a wave while another paddles'. Replace the letter 'n' with 'w' in the sentence.

SOLUTION:
surfer ridiwg uwder a wave while awother paddles