What's the Most Important Thing With San Simbl Cardn's Correspondencies?

The most important thing with introduction of san simbl cardn's correspondencies is consistency. So one starts with, you know, a, c, d, f, g, o, c, b, and then e. And the next one is p, b, t, d, k, g. Don't know how to sound those ones out, ause i haven't been taught phonicn can you tell us, does this matter of introduction kind of matter? An, an, is there one that makes more sense to you or less sense to you? I'm just really quite interested in the fact that these programs have chosen to introduce them into different orders. And ration