diff --git a/bob/day09/day09-p1.py b/bob/day09/day09-p1.py
new file mode 100644
index 0000000..e8c8fa0
--- /dev/null
+++ b/bob/day09/day09-p1.py
@@ -0,0 +1,45 @@
+import itertools
+
+def get_area(a,b):
+    min_x = min(a[0],b[0])
+    max_x = max(a[0],b[0])
+
+    min_y = min(a[1],b[1])
+    max_y = max(a[1],b[1])
+
+    x = max_x - min_x + 1
+    y = max_y - min_y + 1
+
+    return x * y
+
+def read_input(filename):
+    space = []
+    for line in open(filename).read().splitlines():
+        x,y = line.split(",")
+        space.append((int(x), int(y)))
+    return space
+
+
+# filename = "day09/example_input" # 50
+filename = "day09/input" # 4761736832
+
+tiles = read_input(filename)
+
+# build list of (unique) combinations
+tiles_comb = itertools.combinations(tiles,2)
+
+print("Calculate distances")
+# Add distance to the list
+tiles_area = []
+for a,b in tiles_comb:
+    area = get_area(a,b)
+    tiles_area.append((a,b,area))
+
+# def jd_sort(junc_dist):
+#     return junc_dist[2]
+# tiles_area.sort(key=jd_sort)
+tiles_area.sort(key=lambda x: x[2])
+
+
+
+print(f"Largest area: {tiles_area[-1][2]}")
diff --git a/bob/day09/example_input b/bob/day09/example_input
new file mode 100644
index 0000000..c8563ea
--- /dev/null
+++ b/bob/day09/example_input
@@ -0,0 +1,8 @@
+7,1
+11,1
+11,7
+9,7
+9,5
+2,5
+2,3
+7,3
diff --git a/bob/day09/input b/bob/day09/input
new file mode 100644
index 0000000..3bd69d9
--- /dev/null
+++ b/bob/day09/input
@@ -0,0 +1,496 @@
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