As an Englishman I find it rather, well let's just say, wrong to make up a word and then use it like it really means anything. What is wrong with using words correctly? Parentcy is NOT a word any more than Alphbetcy is. It should read, .. parent/legacy or alphabetical legacy. It is an insult to your intelligence when you use non words as though they are words.
Now, as to this challenge it would be nice to also be able to understand the rules a bit better. So if you could re do them I would greatly appreciate it. It was one that caught my eye and not just because of the silly word. Ta!