I would like to solve this question. I think the answer is 35, but I do not know how to do it without extremely long analysis of possibilities.
Is there a short way to solve this problem? Maybe the fact that $A_{12}$ is simple helps?
I would like to solve this question. I think the answer is 35, but I do not know how to do it without extremely long analysis of possibilities.
Is there a short way to solve this problem? Maybe the fact that $A_{12}$ is simple helps?
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