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It seems like you've mentioned "Multi DO Challenge," but I'm not sure what specific information or context you're looking for. As of my last knowledge update in September 2021, I don't have information on events or challenges that occurred after that date. If "Multi DO Challenge" is something that has emerged or become popular after September 2021, I won't have details about it. Could you please provide more context or information about what the "Multi DO Challenge" is? This would help me assist you more effectively.