C123132112322333121111113121111331333133313231333232323221221231   >>    C12313211232233312111111312111133133313331323133323232322122123   <<    C123132112322333121111113121111331333133313231333232323221221233   >>      C123132112322333121111113121111331333133313231333232323221221232   >>