What are you supposed to do if you write out a phrase and you reduce all the letters, and there aren’t any left with which to make the sigil? The rule I’ve always followed is just to cross out the letters that repeat, and a couple of times that happened to me. I ended up having to rewrite the phrase to make it work, ending up with something that’s not exactly ideal.
You don’t have to be that strict with the process. The idea behind striking out all of the vowels and the duplicate letters is that it helps in the bigger process of turning the words into abstract symbols. You don’t actually have to do it that way at all, it’s mostly just a time saver.
Follow me here: When you take out the vowels and the duplicate letters, the sentence becomes harder to read, right? Maybe even impossible to read. From there, it’s much easier to mashup the handful of remaining symbols into a completely new symbol that has only the meaning you gave it. It stands for the desire itself, rather than the complex, baggage-filled words and letters you used to represent it before. It’s basically a fresh start for expressing a pure desire.
Any method that gets you to that same end result will work. You can swap out the characters of the sentence for a different alphabet, for instance. You can cover your eyes and write the letters in cursive. You can only use the anchoring words of the sentence, so “I will find the perfect hat to go with my blue shoes” becomes “find perfect hat blue shoes,” and then scramble up all of those letters in a big circle, randomly connecting them back together. You can even do things like the “magic square” approach, assigning a numeric value to the letters on a grid. The possibilities are endless.
As long as the end result is a new symbol for your desire, and that it has only the meaning you gave it, you’ve done it right.