C11111333133313232233133313331333133313231333133311233133313232212321   >>    C1111133313331323223313331333133313331323133313331123313331323221232   <<    C11111333133313232233133313331333133313231333133311233133313232212323   >>      C11111333133313232233133313331333133313231333133311233133313232212322   >>