C312312111111331312111133133313331333133313232233133313331333131312321   >>    C31231211111133131211113313331333133313331323223313331333133313131232   <<    C312312111111331312111133133313331333133313232233133313331333131312323   >>      C312312111111331312111133133313331333133313232233133313331333131312322   >>