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

[Q]: Sentence: 'a young boy in a shopping cart looking at tooth brushes'. Replace the letter 'o' with 'r' in the sentence.
[A]: a yrung bry in a shrpping cart lrrking at trrth brushes


[Q]: Sentence: 'a yellow fire truck parked in a parking lot'. Replace the letter 'a' with 'y' in the sentence.
[A]: y yellow fire truck pyrked in y pyrking lot


[Q]: Sentence: 'a baseball player running to third base from second'. Replace the letter 'a' with 'u' in the sentence.
[A]:
u busebull pluyer running to third buse from second