diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 0b57242..b2709eb 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,12 +13,12 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "99 Templates/New File Template.md",
+                "file": "00 Inbox/29593852 - Strings.md",
                 "mode": "source",
                 "source": false
               },
               "icon": "lucide-file",
-              "title": "New File Template"
+              "title": "29593852 - Strings"
             }
           }
         ]
@@ -184,9 +184,12 @@
   },
   "active": "140d404d9b2faf63",
   "lastOpenFiles": [
-    "Automationtheory.md",
-    "99 Templates/New File Template.md",
+    "10 Courses/02 - SoSe 2026/Automatentheorie und formale Sprachen/29593850 - Automationtheory.md",
+    "00 Inbox/29593852 - Strings.md",
     "10 Courses/02 - SoSe 2026/ET II/29592673 - Elektrotechnik II.md",
+    "99 Templates/New File Template.md",
+    "99 Templates/New File Template.md~",
+    "00 Inbox/29593849 - Automationtheory.md",
     "00 Inbox/29593844 - Basics of formal languages.md",
     "00 Inbox/29593844 - Automationtheory.md",
     "00 Inbox/29593843 - newFile.md",
@@ -211,15 +214,12 @@
     "20 Atlas",
     "30 Library/29592593 - ET_II_Folien_gesamt_020426.pdf",
     "10 Courses/02 - SoSe 2026/ET II/Zählpfeilsysteme.md",
-    "10 Courses/02 - SoSe 2026/ET II/Elektrotechnik II.md",
-    "00 Inbox/29592877 - review.md",
     "30 Library/ET_II_Folien_gesamt_020426.pdf",
     "30 Library/d6d88eed747e389e597d2a19bb868ee6?cid=4b45b3a6f32c35a6d9ca5b1b07b760de",
     "30 Library/wget-log",
     "99 Templates/New File Template",
     "99 Templates",
     "00 Inbox",
-    "90 Archive",
     "10 Courses/01 - WiSe 2025_26/ET/images/beispiel_knotenregel.png"
   ]
 }
\ No newline at end of file
diff --git a/00 Inbox/29593852 - Strings.md b/00 Inbox/29593852 - Strings.md
new file mode 100644
index 0000000..95171d6
--- /dev/null
+++ b/00 Inbox/29593852 - Strings.md	
@@ -0,0 +1,40 @@
+---
+created: 2026-04-08 08:52
+course:
+topic:
+related:
+type: lecture
+status: 🔴
+tags:
+  - university
+---
+## 📌 Summary
+
+> [!abstract]
+> 
+
+---
+
+## 📝 Content
+
+### Alphabets
+Alphabets are formal, non-empty, sets of symbols (usually lowercase letters). They are denoted by $Sigma$.
+
+$Sigma = {a, b}$
+> Alphabet $Sigma$ contains the characters $a$ and $b$.
+
+### Strings
+A string is a set of letters. If there is an alphabet $Sigma = {a,b}$ then `abba` is a string made from that alphabet.
+The empty string is denoted by $epsilon$.
+### Concatenation
+String can be concatenated, where one string is appended to another. This operation is 
+
+### Reversing / Mirroring
+For a string $x = a_1 a_2 ... a_(n-1) a_n$ of length $n$, it's _mirrored string_ is given by 
+$$ x^("Rev") = a_n a_(n-1)...a_2 a_1$$
+
+### Kleene Star
+Denoted by $Sigma^*$. The Kleene Star (or _Kleene Closure_) 
+
+### Formal Languages
+A formal _language_ of the alphabet $Sigma$ is a subset $L$ of $Sigma^*$
\ No newline at end of file
diff --git a/10 Courses/02 - SoSe 2026/Automatentheorie und formale Sprachen/29593850 - Automationtheory.md b/10 Courses/02 - SoSe 2026/Automatentheorie und formale Sprachen/29593850 - Automationtheory.md
new file mode 100644
index 0000000..945a648
--- /dev/null
+++ b/10 Courses/02 - SoSe 2026/Automatentheorie und formale Sprachen/29593850 - Automationtheory.md	
@@ -0,0 +1,7 @@
+---
+created: 2026-04-08 08:50
+course: "[[29593850 - Automationtheory]]"
+type: overview
+tags:
+  - university
+---
diff --git a/99 Templates/New File Template.md b/99 Templates/New File Template.md
index 6224909..64b0b62 100644
--- a/99 Templates/New File Template.md	
+++ b/99 Templates/New File Template.md	
@@ -1,25 +1,24 @@
- <%*
-// Move the file to the Inbox immediately upon creation
-let date = Math.floor(Date.now() / 60000)
-let newName = `${date} - ${tp.file.title}`
-await tp.file.move("/00 Inbox/" + newName)
--%>
 ---
 created: <% tp.date.now("YYYY-MM-DD HH:mm") %>
-course:
-topic:
-related:
+course: 
+topic: 
+related: 
 type: lecture
 status: 🔴
 tags:
   - university
 ---
+<%*
+// Move the file to the Inbox immediately upon creation
+let date = Math.floor(Date.now() / 60000);
+let newName = `${date} - ${tp.file.title}`;
+await tp.file.move("/00 Inbox/" + newName);
+-%>
 ## 📌 Summary
 
 > [!abstract]
->
+> 
 
 ---
 
 ## 📝 Content
-