TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'the two boys are eating large carrots while sitting on a blanket'. Replace the letter 'a' with 'q' in the sentence.

SOLUTION: the two boys qre eqting lqrge cqrrots while sitting on q blqnket

PROBLEM: Sentence: 'a rose that is sitting in a vase'. Replace the letter 'r' with 'j' in the sentence.

SOLUTION: a jose that is sitting in a vase

PROBLEM: Sentence: 'the surfer with red pants and grey top rides the wave atop the white surfboard'. Replace the letter 'd' with 't' in the sentence.

SOLUTION:
the surfer with ret pants ant grey top rites the wave atop the white surfboart