C312312111133131121333133313113313331333133313331323223313123311   >>    C31231211113313112133313331311331333133313331333132322331312331   <<    C312312111133131121333133313113313331333133313331323223313123313   >>      C312312111133131121333133313113313331333133313331323223313123312   >>