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By Renee Maltezou and Deepa Babington ATHENS (Reuters) - Greek Prime Minister Alexis Tsipras said on Tuesday he was confident of an early deal with international creditors, after shaking up his negotiating team and sidelining his outspoken finance minister who has infuriated euro zone partners. Athens is weeks away from running out of cash, and talks with EU and IMF lenders on more aid have been deadlocked over their demands for Greece to implement reform measures, including pension cuts and labor market liberalization. Greek financial markets and the euro rallied on Monday on hopes that the relegation of Finance Minister Yanis Varoufakis, a Marxist academic prone to lecturing his euro zone peers, would improve prospects for an early deal to avoid a default that might lead to a Greek exit from the currency area. Pressed on the options if no deal were found, Tsipras ruled out snap elections but said the government did not have the right to accept demands that fell outside the limits of its mandate and would have to ask Greeks to decide.