If you do this, you'll be penalized. I'll report any flip that contains words or is numbered. 
Penalty occurs only if mining doesn't work for more than an hour.Or are you a developer and will you force penalties to miners you don't like ? That is how your decentralization works ? Then you will bury your coin with your own hands, because everyone will know about it.
And people do not like it when someone can manage their personal accounts.
And yet, people love money, not your stupid pictures, so
Guys, number flips!
Number in any way:
1,2,3,4
or
. .. ... ....
or
l ll lll lV
or
A B C D
Don't worry about the developers.
Now we have to solve 6 flips, not 5. And it will take more time!
Let's help each other, do not report such flips.
We are all here to mine more coins and make more money.
You can also tell your flip story in advance here
https://bitcointalk.org/index.php?topic=5228079
so that everyone understands your story before validation starts.
No darling. Let it be harder to bots/Ai to solve the puzzles, this is the purpose of the project in the first place.
If you make it easier to guess with letters and/or numbers, means you have more than one account and this is unfair for the rest of us.
6 flips in 2 minutes is doable, at least for me.