diff --git a/09/09-1.py b/09/09-1.py
new file mode 100644
index 0000000..895c6d1
--- /dev/null
+++ b/09/09-1.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# file = "./ex.txt"
+file = "./input.txt"
+
+if __name__ == "__main__":
+    solution = 0
+    positions = []
+    input_file = open(file, "r")
+    for line in input_file:
+        line = line.strip()
+        if line == "":
+            continue
+        else:
+            a,b = line.split(',')
+            a = int(a)
+            b = int(b)
+            positions.append([a,b])
+
+    for i in range(len(positions)):
+        for j in range(i+1, len(positions)):
+            area = (abs(positions[i][0]-positions[j][0])+1)*(abs(positions[i][1]-positions[j][1])+1)
+            if area > solution:
+                solution = area
+    print(f"Solution: {solution}")
diff --git a/09/ex.txt b/09/ex.txt
new file mode 100644
index 0000000..c8563ea
--- /dev/null
+++ b/09/ex.txt
@@ -0,0 +1,8 @@
+7,1
+11,1
+11,7
+9,7
+9,5
+2,5
+2,3
+7,3
diff --git a/09/input.txt b/09/input.txt
new file mode 100644
index 0000000..b8f4b64
--- /dev/null
+++ b/09/input.txt
@@ -0,0 +1,496 @@
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