In this task, you need to replace a letter in the sentence with another given letter.

Q: Sentence: 'a fire fighter climbs onto the roof of a market with a ladder'. Replace the letter 'r' with 'k' in the sentence.

A: a fike fightek climbs onto the koof of a makket with a laddek
****
Q: Sentence: 'a train traveling through a dark tunnel next to green brush.'. Replace the letter 'r' with 'e' in the sentence.

A: a teain teaveling theough a daek tunnel next to geeen beush.
****
Q: Sentence: 'a women who is swinging at a tennis ball'. Replace the letter 'w' with 'm' in the sentence.

A:
a momen mho is sminging at a tennis ball
****