PARIS (Reuters) - IMF Managing Director Christine Lagarde said on Friday the Fund was ready to participate in what she called a "complete" package to put the Greek economy back on its feet, make its debt sustainable and allow it to get its funding from financial markets. She reaffirmed on Europe 1 radio her view that the country needed some form of debt relief, arguing that this did not have to be an outright write-off but could involve measures such as a significant extension of loan maturities and stretching of repayment schedules. (Reporting by Mark John; editing by Dominique Vidalon)