There are 6 boxes of 12-color pencils mixed together in a bag. Each time you touch out a pen, to ensure that out contains 12 color pens, at least how many times to touch?

It is assumed that the worst result, the first 6 times out of a color, and then 6 times and then take out the same color ............ a need that 11 * 6 = 66 times to take out 11 colors, the rest are the same color, how to take out the whole, so it's 66+1=67 times

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