TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a yellow fire hydrant sitting on the sidewalk'. Replace the letter 'o' with 'd' in the sentence.

SOLUTION: a yelldw fire hydrant sitting dn the sidewalk

PROBLEM: Sentence: 'a painting of scissors going to cut a chain with a lock'. Replace the letter 'g' with 'v' in the sentence.

SOLUTION: a paintinv of scissors voinv to cut a chain with a lock

PROBLEM: Sentence: 'tennis player wearing blue and white hitting a ball'. Replace the letter 'h' with 'l' in the sentence.

SOLUTION:
tennis player wearing blue and wlite litting a ball