C1111233133313231133133313331333133311221123121111133313113313232212131   >>    C111123313331323113313331333133313331122112312111113331311331323221213   <<    C1111233133313231133133313331333133311221123121111133313113313232212133   >>      C1111233133313231133133313331333133311221123121111133313113313232212132   >>