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: 'the kitchen has a big screen tv and a lot of counter space'. Replace the letter 'h' with 'z' in the sentence.
[A]: tze kitczen zas a big screen tv and a lot of counter space


[Q]: Sentence: 'a long subway type train among some buildings'. Replace the letter 's' with 'g' in the sentence.
[A]:
a long gubway type train among gome buildingg