C1111133313331323223313331333133313113313113313231333133313123231211   >>    C111113331333132322331333133313331311331311331323133313331312323121   <<    C1111133313331323223313331333133313113313113313231333133313123231213   >>      C1111133313331323223313331333133313113313113313231333133313123231212   >>