C11111333133313232233133313331333133313231333133311233133313333121   >>    C1111133313331323223313331333133313331323133313331123313331333312   <<    C11111333133313232233133313331333133313231333133311233133313333123   >>      C11111333133313232233133313331333133313231333133311233133313333122   >>