sentence: My favorite swimmer is Michael Phelps because he was the best swimmer in the world , and I hope that he returns to the Olympic games in Rio de Janeiro in 2016 .
modified: My favorite swimmer is Michael Phelps because He was the best swimmer in the world and I hope that He returns to olyimpic games at Rio de Janeiro in 2016 .
transformation: ORTH, PUNCT, ORTH, DET, SPELL, PREP