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

Q: Sentence: 'a couple of brown bears walking across a lush green field'. Replace the letter 'w' with 'o' in the sentence.

A: a couple of broon bears oalking across a lush green field
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Q: Sentence: 'a bike sitting parked next to a cart in front of some boxes'. Replace the letter 't' with 'x' in the sentence.

A: a bike sixxing parked nexx xo a carx in fronx of some boxes
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Q: 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:
a woman holdina the arm of a life size teddy bear in a auard outfit
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