syntax = "proto3";

package a;

enum Two {
  reserved 2 to 6;

  TWO_UNSPECIFIED = 0;
}

message Three {
  message Four {
    enum Five {
      reserved 2 to 6;

      FIVE_UNSPECIFIED = 0;
    }
    enum Six {
      SIX_UNSPECIFIED = 0;
      SIX_ONE = 1;
      SIX_TWO = 2;
    }
  }
  enum Seven {
    reserved 2 to 6;

    SEVEN_UNSPECIFIED = 0;
  }
  enum Eight {
    EIGHT_UNSPECIFIED = 0;
    EIGHT_ONE = 1;
    EIGHT_TWO = 2;
  }
}

enum Ten {
  option allow_alias = true;
  TEN_UNSPECIFIED = 0;
  TEN_ONE = 1;
  TEN_TWO = 1;
}

enum Eleven {
  ELEVEN_UNSPECIFIED = 0;
}
