一道程序题，初始状态下的六面魔方，转动四次最多使一面有多少种颜色。答案是6种，程序证明。-A program title, six-sided cube initial state, so that one side turning up to four times the number of colors. The answer is six kinds, the program proved.

WPF Rubiks Cube realized in Visual Basic .NET

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