Q: In this task, you need to replace a letter in the sentence with another given letter.
Sentence: 'if one ever wanted to see penguin and sheep living in perfect harmony, they need only to look at this photograph'. Replace the letter 'o' with 'r' in the sentence.
A:
if rne ever wanted tr see penguin and sheep living in perfect harmrny, they need rnly tr lrrk at this phrtrgraph