C3132121111133313233121111331333133313331333133313231123313231211   >>    C313212111113331323312111133133313331333133313331323112331323121   <<    C3132121111133313233121111331333133313331333133313231123313231213   >>      C3132121111133313233121111331333133313331333133313231123313231212   >>