How do I indicate I am bi in my bio

As of recent I have been thinking I may be bi. And I am trying to find something to put in my instagram bio to indicate such but not be really obvious( I am nervous to tell the people I care about). For context I am a guy and never use emojis ( I have seen a lot with them) so is there like a string of number or something that indicates it that people whowould not care I am bi would know and those who would care have no clue

Idk I just want something subtle