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1 box contains red balls,another box with green balls and another box with red and green balls together.all the three boxes are named differently say box with red balls with the name "green" and box with green balls as "red&green" and box with red and green balls named as "red" they are named mis-matchingly,im allowed to open only one box and find the color and name it correctly.how do i name the other two boxes correctly without opening them

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