Name can't begin with a number.

20xx/description.md

@@ -1 +1 @@
-My friend sent me [this file](${20xx_dtm}) and told me to git gud.
+My friend sent me [this file](${_20xx_dtm}) and told me to git gud.

20xx/problem.yml

@@ -5,4 +5,4 @@ autogen: false
 programming: false
 value: 50
 files:
-  - 20xx.dtm
+  - _20xx.dtm

edge1/problem.yml

@@ -1,5 +1,5 @@
 title: Edge 1
 category: Web
-value: 50
+value: 100
 author: neptunia
 autogen: false

edge2/description.md

@@ -0,0 +1 @@
+Last time we screwed up. But we've [learned our lesson](http://edge2.web.easyctf.com).

edge2/grader.py

@@ -0,0 +1,4 @@
+def grade(random, key):
+    if key.find("hiding_the_problem_doesn't_mean_it's_gone!") != -1:
+        return True, "Correct!"
+    return False, "Nope."

edge2/problem.yml

@@ -0,0 +1,5 @@
+title: Edge 2
+category: Web
+value: 200
+author: mzhang
+autogen: false