Here's an invite code: OY4X-RI2J-7EAU-Y94M. No, it's not a real one. It's been mangled by a (hopefully) easy enough process that someone can solve it. Keep in mind, this isn't designed to be hard, but it is designed to shoo away potential bots. Good luck!

Edit0: The first character, at index zero, really is an 'O'
Edit1: The sequence is linear
Edit-2: The second character, at index one, isn't 'Y', but it's close
Edit3: '-' is also a character

Question

Here's an invite code: OY4X-RI2J-7EAU-Y94M. No, it's not a real one. It's been mangled by a (hopefully) easy enough process that someone can solve it. Keep in mind, this isn't designed to be hard, but it is designed to shoo away potential bots. Good luck!

Edit0: The first character, at index zero, really is an 'O'
Edit1: The sequence is linear
Edit-2: The second character, at index one, isn't 'Y', but it's close
Edit3: '-' is also a character