syntax = "proto3";

package a;

enum One {
  ONE_UNSPECIFIED = 0;
}

enum Two {
  TWO_UNSPECIFIED = 0;
}

message Three {
  message Four {
    enum Five {
      FIVE_UNSPECIFIED = 0;
    }
    enum Six {
      SIX_UNSPECIFIED = 0;
    }
  }
  enum Seven {
    SEVEN_UNSPECIFIED = 0;
  }
  enum Eight {
    EIGHT_UNSPECIFIED = 0;
  }
}
