C11111333133313232233133313331333133313231312111133131132212111   >>    C1111133313331323223313331333133313331323131211113313113221211   <<    C11111333133313232233133313331333133313231312111133131132212113   >>      C11111333133313232233133313331333133313231312111133131132212112   >>