TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a bathroom that has  a sink and a toilet'. Replace the letter 's' with 'a' in the sentence.

SOLUTION: a bathroom that haa  a aink and a toilet

PROBLEM: Sentence: 'a study table with computer, mouse and keyboard .photo frame are also kept'. Replace the letter 'u' with 'q' in the sentence.

SOLUTION: a stqdy table with compqter, moqse and keyboard .photo frame are also kept

PROBLEM: Sentence: 'a stop sign that has a sign below it clarifying there is no stopping between certain times'. Replace the letter 't' with 'f' in the sentence.

SOLUTION:
a sfop sign fhaf has a sign below if clarifying fhere is no sfopping befween cerfain fimes