C11111333133313232233133313331333133313331322121111113313113231   >>    C1111133313331323223313331333133313331333132212111111331311323   <<    C11111333133313232233133313331333133313331322121111113313113233   >>      C11111333133313232233133313331333133313331322121111113313113232   >>