NOTE the two Ds and the three P's. 2+3=5 and everyone knows what 5 means (forget that different sites/publications have different meanings.) Is that coincidence?? Or not.
In rooster's mind it could be seen as very weird. I mean why not As, Bs or C's.
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”