"Ender. Dragon. I was in Dragon Army, unlike most of them. And whom else would they be writing to? I'm outside, they're in. They know that everyone is there but me. And I'm the only person that they'd know they could reach without tipping their hand to everybody else."
"What, did you have some private code?"
"Not really, but what we have is common experience, the slang of Battle School, things like that. You'll see. When I crack it, it'll be because I recognize a word that nobody else would recognize."
"If it's from them."
"It is," said Bean. "It's what I'd do. Get word out. This picture is like a virus. It goes everywhere and gets its code into a million places, but nobody knows it's a code because it looks like something that most people think they already understand. It's a fad, not a message. Except to me."
"Almost thou persuadest me," said Carlotta.
"I'll crack it before I go to bed."
"You're too little to drink that much coffee. It'll give you an aneurysm."
She went back to her own mail.
Since the words weren't separated, Bean had to look for other patterns that might give things away. There were no obvious repeated two-letter or three-letter patterns that didn't lead to obvious dead ends. That didn't surprise him. If he had been composing such a message, he would have dropped out all the articles and conjunctions and prepositions and pronouns that he possibly could. Not only that, but most of the words were probably deliberately misspelled to avoid repetitive patterns. But some words would be spelled correctly, and they would be designed to be unrecognizable to most people who weren't from the Battle School culture.
There were only two places where the same character was apparently doubled, one in each line. That might just be the result of one word ending with the same letter that began another, but Bean doubted it. Nothing would be left to chance in this message. So he wrote a little program that would take the doubled letters in one word and, beginning with "aa," show him what the surrounding letters might be to see if anything looked plausible to him. And he started with the doubled letters in the shorter line, because that pair was surrounded by another pair, in a 1221 pattern.
The obvious failures, like "xddx" and "pffp," took no time, but he had to investigate all the variants on "abba" and "adda" and "deed" and "effe" to see what they did to the message. Some were promising and he saved them for later exploration.
"Why is it in Greek now?" asked Carlotta.
She was looking over his shoulder again. He hadn't heard her get up and come over behind him.
"I converted the original message to Greek characters so that I wouldn't get distracted by trying to read meanings into letters I hadn't decoded yet. The ones I'm actually working on are in Roman letters."
At that moment, his program showed the letters "iggi."
"Piggies," said Sister Carlotta.
"Maybe, but it doesn't flag anything for me." He started cycling through the dictionary matches with "iggi," but none of them did any better than "pi
ggies" had.
"Does it have to be a word?" said Carlotta.
"Well, if it's a number, then this is a dead end," said Bean.
"No, I mean, why not a name?"
Bean saw it at once. "How blind can I be." He plugged the letters w and n to the positions before and after "iggi" and then spread the results through the whole message, making the program show hyphens for the undeciphered letters. The two lines now read
---n-------g---n---n---n---i---n---g
--n-n-wiggin--
"That doesn't look right for Common," said Carlotta. "There should be a lot more i's than that."
"I'm assuming that the message deliberately leaves out letters as much as possible, especially vowels, so it won't look like Common."
"So how will you know when you've decoded it?"
"When it makes sense."
"It's bedtime. I know, you're not sleeping till you've solved it." He barely noticed that she moved away from behind him. He was busy trying the other doubled letter. This time he had a more complicated job, because the letters before and after the double pair were different. It meant far more combinations to try, and being able to eliminate g, i, n, and w didn't speed up the process all that much.