C313212111133131211331333133313331333133312111133133313331333133313231322121311   >>    C31321211113313121133133313331333133313331211113313331333133313331323132212131   <<    C313212111133131211331333133313331333133312111133133313331333133313231322121313   >>      C313212111133131211331333133313331333133312111133133313331333133313231322121312   >>