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

Sentence: 'a city street with cars and busses near buildings'. Replace the letter 'e' with 'd' in the sentence.
a city strddt with cars and bussds ndar buildings

Sentence: 'a mobile phone and a set of keys on a key chain'. Replace the letter 's' with 'j' in the sentence.
a mobile phone and a jet of keyj on a key chain

Sentence: 'a giraffe standing in grass in a palm tree filled environment'. Replace the letter 's' with 'g' in the sentence.
a giraffe gtanding in gragg in a palm tree filled environment