TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a couple of giraffes being feed by people at the zoo'. Replace the letter 't' with 'v' in the sentence.

SOLUTION: a couple of giraffes being feed by people av vhe zoo

PROBLEM: Sentence: 'this poster is advertising high performance with a girl riding a bicycle and some taxis on the street'. Replace the letter 't' with 'f' in the sentence.

SOLUTION: fhis posfer is adverfising high performance wifh a girl riding a bicycle and some faxis on fhe sfreef

PROBLEM: Sentence: 'a room with couches, tables and potted plant'. Replace the letter 'l' with 'w' in the sentence.

SOLUTION:
a room with couches, tabwes and potted pwant