C1111233133313231133133313331333133311221123121111113313232213231311   >>    C111123313331323113313331333133313331122112312111111331323221323131   <<    C1111233133313231133133313331333133311221123121111113313232213231313   >>      C1111233133313231133133313331333133311221123121111113313232213231312   >>