The Half-Elf has a trait called Ability Score Increase which states:
Your Charisma score increases by 2, and two other ability scores of your choice increase by 1.
Do these "other ability scores" need to only be other than Charisma, or do they exclude each other as well? Can I increase, say, Dexterity as the first that is "other" than Charisma and then Dexterity as my second since it is still "other" than Charisma?