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

Sentence: 'a woman holding the arm of a life size teddy bear in a guard outfit'. Replace the letter 'g' with 'a' in the sentence.
a woman holdina the arm of a life size teddy bear in a auard outfit

Sentence: 'a giraffe and a zebra stare at each other'. Replace the letter 'g' with 'l' in the sentence.
a liraffe and a zebra stare at each other

Sentence: 'a large train is pulled into a tunnel of brick'. Replace the letter 'i' with 'v' in the sentence.
a large travn vs pulled vnto a tunnel of brvck