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

Sentence: 'a fire fighter climbs onto the roof of a market with a ladder'. Replace the letter 'r' with 'k' in the sentence.
a fike fightek climbs onto the koof of a makket with a laddek

Sentence: 'a woman holding a tennis racket getting ready to hit a tennis ball'. Replace the letter 'r' with 'l' in the sentence.
a woman holding a tennis lacket getting leady to hit a tennis ball

Sentence: 'a herd of sheep grazing in a field filled with tall green grass'. Replace the letter 'e' with 'i' in the sentence.

a hird of shiip grazing in a fiild fillid with tall griin grass