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

Sentence: 'a herd of zebra grazing in a lush green field'. Replace the letter 'h' with 'j' in the sentence.
a jerd of zebra grazing in a lusj green field

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 purple umbrella lying on the green water'. Replace the letter 't' with 'v' in the sentence.
a purple umbrella lying on vhe green waver