C11111333133313232233133313331333132313331323321313331323232212321   >>    C1111133313331323223313331333133313231333132332131333132323221232   <<    C11111333133313232233133313331333132313331323321313331323232212323   >>      C11111333133313232233133313331333132313331323321313331323232212322   >>