I've designed this up so that DR and MA are more rare and tricker to work out than the other ones. I'd recommend doing smaller bins of 4-5 numbers at a time to see if you can accidentally find it and work out the pattern.
Really light spoiler incoming: If you've worked out how to reliably get FC you're on the way to working out one of the ways to get DR (each type of scary number has 2 triggers). Consider the meaning of FR in the show vs the way you find it in the game. How does the emotion behind FC look different to DR irl.